Top Definition
To try to have sex with a woman while she is sleeping. Usually this is done to a girlfriend or wife. Otherwise some of the more conservative people could profile this act as rape.
Guy 1: Hey man what are you doing?
Guy 2: Nothing just at my house and my girl is asleep and I really need to bust a nut.
Guy 1: I recommend you sneak one in.
Guy 2: Capital idea!
by Senor Ringpiece August 18, 2009
7 Words related to sneak one in

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