when a man is in deep sleep and begins to try to hump nearest available orifice or object.
"Oh baby, it's not my fault I musta been sleep cocking again."
"it never fails, 3 am he can't sleep and tries to blame it on his sleep cocking"
by John Easton September 30, 2007
Verb: The act of awaking from a long dream of dick sucking, and a cock is in your mouth.
I can't believe Holly sleepcocked last night! Oh, she gets caught sleepcocking all the time.
by Mcshakey September 26, 2010

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