(v) catch unawares, especially with harmful consequences(v) attack or hit on or from the side where the attacked person's view is obstructed

from a set piece, ruck or maul, the short side of the field. Also called the Weakside.

The narrow side of the pitch in relation to a scrum or a breakdown in play; it is the opposite of open side. The blindside flanker is expected to cover the opposing team open side at scrum and breakdo [..]

 means the side of the scrum or of the play the ball nearer to touch.

The side of the field from scrum ruck and maul nearest to the touchline.

from a set piece, ruck or maul, the short side of the field. Also called the Weakside.

The area outside the quarterback’s vision. This is the most dangerous place for a quarterback to receive a hit from a defender as he doesn’t see the pressure coming.

(automotive) A driver's field of blindness around an automobile; the side areas behind the driver. (rugby) the space on the side of the pitch with the shorter distance between the breakdown/set pi [..]

lang=en *'''1982''', Chris Bunch & Allan Cole, ''Sten'', Del Rey/Ballantine, ISBN 0-345-28503-4, p. 92: *:"the first man made the mistake of trying to blindside Mahoney from a dead-end passageway." * [..]