Top Definition
1.To thump someone's crotch.

2.To thrust your crotch in a manner that will knocks on one's door.
Brahh, this St.Patrick's Day we should totally go out crotch knocking.
#hobknocker #genitals #thrusting #supernanny #st.patricks day.
by Dr.Mustachio December 31, 2010
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