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When the button portion of one's jeans is caught underneath the belt, pushing the lower zip section of the trousers outwards, creating the illusion of a boner.
Frank: Ay look Bills got a hard-on

Bill: Nah bruv (correcting his jeans), it's just the boner effect. Don't get gassed.
by Versace Stabzz April 24, 2016
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Apr 21 Word of the Day
I've been jabbed
by Francesco II March 20, 2021
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