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When your cotch, or state of relaxation and comfort, is ruined by a irritating or aggravating person or thing. Similar to cockblock.
#1 Dude, me and my mates were just chilling last night when Dave's girlfriend called.

Ah man, Claire is such a cotchblocker.

#2 Stop talking to me about that exam tomorrow! What a cotchblock.
by wimwiblin April 08, 2012
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