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A quite painful punch in the rear end; "Procto Punch!" must be said like captain falcon to alert the victim of their ass's demise. Usually done when the victim cannot escape in time.

To punch someone in the ass
Tim: Procto,

Bob: No-

Tim: Punch! (punches Bob in the ass cheek)

Bob: Why would you do that man?

Tim: Lol you got Procto Punched
by CaptainBakes April 25, 2011