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Eating more than you need to. Kind of like pigging out.
I could've had a salad, but decided to chub it out and go with a burger + fries instead.
by The Farticle Theory June 06, 2016
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Upon a disagreement between two men. Its when two guys stick penis tips together, the first guy who gets a chub loses and is gay
Man 1: Football is the best sport in the world.

Man 2: No way, hockey is way better.

Man 1: I challenge you to chub it out.

Man 2: I accept.

(Chub out commences and Man 1 produces a slight boner first.)

Therefore Man 1 is wrong and is also gay.
by man 3 September 16, 2013
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