A term coined by Woody Harrelson's character Tallahassee in the zom-com Zombieland. He typically uses it to describe his kind of awkward, goodhearted comrade with a Coach Gun, Columbus. It's an obvious play on the typical term "spitfire".
"Kid finally got to first base... Not bad for that skinny, little spitfuck."- Tallahassee
The meaning derives from the movie "Zombieland"
but it usually means a waste of sperm or just another way of telling someone they are accidents of birth.
The act of putting spin on a ping pongball and your opponent perfectly hits the spin back at you. Causing the ball to ricochet or bounce off the original hitters paddle faster, with more curve and in a direction not intended.
Example 1- I put so much spin on that ball, that when my friend Oz hit it back I spinfucked myself.
Example 2- I just I spinfucked myself playing ping pong.
Example 3-I am not sure how I lost that point. The ball came back so hard and fast that I simply got spinfucked.
Example 4-My buddy looked me in the eyes and instantly new he got spinfucked.