Queer Punch

Queer Punch (n):

Like a straight punch, but with a nasty twist at the end.

‎(alt): Also a fruit cocktail (ie. a punch) with an unexpected or unannounced addition, potentially of the mind altering variety.

A strike to a pressure point that leads to the opponent humiliating themselves could be considered a queer punch, as could a knock-out blow from an unexpectedly capable opponent.