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When you "smash," aka have sex, unknowingly and/or while sleeping.
Dawna: "Rick, this is, like, the second night in a row that you've woken me up at 3am to have sex."

Rick: "What? We had sex last night?"

Ever-so-hip observer: "Rick, hommie, you was sleep-smashin' last night!"

Sleep smashing
by Hutty13 March 29, 2009
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