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To intentionally or unintentionally walk in on, knock, or call while someone is having sex, subsequently disrupting the moment. Busting a suck can be particularly cruel if you are a parent who calls their child while they're on a romantic weekend as it sometimes takes time to recover.
Jack: "Damn, I left my wallet in the spare room & Mike's been in there with that ho for over an hour! Fuck it, I'm gonna go bust a suck!"
by Urban_Baby_101 January 27, 2014
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