Coming to prevalence in 2016, "mood" is a slang term roughly synonymous with "sentiment", specifically a sentiment that is familiar to the speaker and that he/she recognises as being well expressed. Can be used by calling something "a mood" or simply saying "mood" when one feels empathy with a scenario or depiction of a scenario.

Ex.
Person 1: Look at this picture of a cat looking depressed that I found on the internet lol
Person 2: Mood

"grammatical form indicating the function of a verb," 1560s, an alteration of mode (n.1), but the grammatical and musical (1590s) usages of it influenced the meaning of mood (n.1) in phrases [..]

"emotional condition, frame of mind," Old English mod "heart, frame of mind, spirit; courage, arrogance, pride; power, violence," from Proto-Germanic *motha- (source also of Old Sa [..]

An emotional state at a particular time. A mood felt by an individual at one point in time may be unrelated to emotions felt an another point in time.

A state of mind or emotion, a pervading impression. Related: The Sublime and the Spiritual Landscapes: Real and Imagined The Materials of Minimalism Surrealist Landscapes Modern Landscapes Walker Evan [..]

Stereotypically: romance, comedy, mystery, fantasy, or horror. Mood is one of the prime considerations in determining the lighting-look; another is . . .

temper: a characteristic (habitual or relatively temporary) state of feeling; "whether he praised or cursed me depended on his temper at the time"; "he was in a [..]

Mood shows the attitude of the speaker or the writer to the action or state described by the verb. 1) The Indicative is the verb used in ordinary statements and questions: She went home.Has she called [..]

The general feeling or emotion of the text. The mood created by the language assists the composer to convey his/her attitudes about the subject on an emotional level.

how you feel in your mind. You can be in a good mood when you are happy or in a bad mood when something has made you cross or unhappy

In literature, the emotive attitude or feeling carried by a particular text, for example happiness, excitement, doom. It has much in common with tone (see tone). Grammatically, a verb form conveying t [..]

 –  the feeling that is created in the reader as a result of the tone or atmosphere in a work such as anger.  Tone is created by how the author describes the characters, setting, and events such [..]

the atmosphere created by a piece of writing

 anger.

shtimung

How do you know what a mood disorder is without really knowing what "mood" is? In a nutshell, "mood" is an overall feeling or mental state such as happiness, anger, tension, or anx [..]

The mood of a verb is the manner in which the action or condition is conceived or intended. In English there are three verb moods. 1. Indicative, a verb stating an apparent fact or asking a question. [..]

the emotional dimension or feeling of a play scene or moment in the action.

(n) a characteristic (habitual or relatively temporary) state of feeling(n) the prevailing psychological state(n) verb inflections that express how the action or state is conceived by the speaker

(modus): a category of the verb phrase. See imperative, indicative, subjunctive.

A background feeling that extends over a length of time and which appears to have no specific cause or origin. (Contrast emotion and temperament.) Examples of moods include feeling tired, feeling grumpy, feeling agitated, feeling contented, or feeling energized. Moods are accessible to introspection so we can describe how we feel. While many cultur [..]

Abnormal or excessive excitability with easily triggered Anger, annoyance, or impatience.

the quality of a verb that expresses the speaker’s attitude toward the likelihood, existence, or desirability of the verb’s action. In English, the three moods are indicative, imperative, and subj [..]

A division in the verbal area which refers to whether the action of the verb represents a fact, a wish, a possibility, necessity or a command.

  A persistent and overriding emotion that is present. (e.g., depressed, euphoric, anxious)

When your lady is seriously pissed the fuck off. - "This chic is in a mood!"

a conscious state of mind or predominant emotion.

verb form that depicts the attitude of the writer or speaker e.g. subjunctive, indicative, imperative, conditional

  A reference to the moods or modes expressed through verbs by the writer. The verbs reflect the writer's mood about what he writes. Verbs have three possible moods. The indicative mood describe [..]

The feeling created in a work or art.

The feeling either intended by the originating artist or perceived by person viewing the work of art.

Atmosphere, feeling, spirit, aura, tenor, flavor or tone evoked by a work of art.

A mental or emotional state, composure. ''I've been in a bad mood since I dumped my boyfriend.'' A sullen mental state; a bad mood. ''He's in a mood with me today.'' A disposition to do some [..]

You know how you set the mood for a party by turning down the lights and cranking up the Vengaboys? Writers do the same thing in literature. Mood refers to the emotional atmosphere that a writer const [..]

In psychology, a mood is an affective state. In contrast to emotions or feelings, moods are less specific, less intense and less likely to be provoked or instantiated by a particular stimulus or event [..]

MOOD is a hip hop group based in Cincinnati, Ohio, United States, composed of rappers Main Flow, Donte, and record producer Jahson. Originally formed under the name of Three Below Zero, they wound up [..]

Mood may refer to: Mood (psychology), a relatively long lasting emotional state

In literature, mood is the atmosphere of the narrative. Mood is created by means of setting (locale and surroundings in which the narrative takes place), attitude (of the narrator and of the characte [..]