The act of eating a girl out from the back as she is laying in doggy style position. Your head must be tilted at an angle so you're not facing her anus. It can be tested by using the AT Mohawk Test.
Dude after I fucked her doggy style, I went down and did the AT Reverse Munchkins on her!
In role-playing games, focusing on rules details and exploiting them despite how they ruin the game for other players. In the extreme, taking inky delight in using the rules to ruin the game.
"But the rules say my hafling can throw 10 shuriken, and gets +1 damage with thrown objects, so it MUST mean +10 total." | "That's munchkinness. Should an ogre scream like a sissy 'OMFG! It's a hafling! Run!'?"