"Das" refers to "thats", while "Gey" refers to "gay". Use in a sentence where you forget to say "no homo", after the action that was extremely homo has passed.
Also used for a reaction to shitty memes.
Man 1: Check out this spongegar meme
Man2: Das Gey

Man1: *does homosexual act without saying no homo"
Man 2: Das Gey
by Master of the Succ December 9, 2016
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The act of rebelling against the teacher of the certain class, and playing video games instead of concentrating attentively. This act has been seen more and more frequently with the increasing use of technology and bad teachers
Teacher lecturing the class, while the entire back row is "da gei", being completely unaware of what the teacher is talking about
by Ghost691918632967 June 24, 2013
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slang: to wank, to jerk off

A Cantonese word, literally meaning "hit aeroplane" or "shoot aeroplane". It originally referred to the cocking motion of certain anti-aircraft missiles, which looks just like masturbating.

It's also used in Mandarin, where the pronunciation is "da fei ji"
Wo mei tian da fei ji!
(I jerk off every day)
by ralmin April 13, 2005
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Direct translation is to hit plane. Metaphor for masturbation.
i da fei gei all day
by faye clarke September 18, 2003
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