/X-X-X/ n. A marker that attention is needed. Commonly used in program comments to indicate areas that are kluged up or need to be. Some hackers liken `XXX' to the notional heavy-porn movie ratin [..]

an animal that walks on all four feet.

An indicator of confectioners' sugar relating to the number of times it has been ground. The higher the number of X's the finer the grind.

In Roman Numeral number 30 is written as: XXX

This is not THAT kind of site!

Dictionary of Internet Terms A marker that attention is needed.

Chromosomal abnormalities of the X chromosome.

Roman numeral for "thirty."

(n) the cardinal number that is the product of ten and three(n) (genetics) abnormal complement of three X chromosomes in a female(adj) being ten more than twenty

An indicator on a box of confectioners' sugar of how many times it has been ground. The higher the number of X's the finer the grind.

Inappropriate adult content is outlawed across most social media platforms and users are removed if it is spotted. Adult humour and inappropriate images should be avoided at all costs in social media [..]

Used to designate something as pornographic and sexually explicit.