When you do whatever you have to do to win, short of cheating, but playing dirty.
This derives from the final fight of "Karate Kid" where the main character's leg is broken and the evil Sensai instructs his student to "Sweep the leg" out from under him to win.
If the pitcher wants to get past a good hitter in baseball and throws a fastball at his face, making him walk, and possibly taking him out for the rest of the game, that is an example of "Sweep-the-leg"
When one says something in a bragging manner, and realizes that he is bragging, he may 'call' himself out on this brag, by adding the expression, "self-call" to the end of his statement. It can also be used to call someone else out in their bragging.
I am the best basketball player in the room, self-call!
"A" says, "I'm a great cook."
"B" replies, "Nice self-call"
Used to describe something that really sucks, usually law school related. The term is derived from the name of a certain professor's vagina or snatch, but "duncsnatch" can be said loudly in her presence, as it sounds like a basketball term.
"That Property exam was a real duncsnatch."
"I just flunked out." -Wow, well that's a real duncsnatch.
The best sport ever invented. A modified and therefore, more awesome version of whiffle ball. It is played in a backyard setting. Rules can be constructed around the various irregularities of a backyard/home field. No running is involved as runs are scored based on how far the batter hits the ball. The batter and pitcher must hold a beer at all times while this is optional for fielders and catchers. Four people is all that is necessary to play but the number can be increased based on the side of the yard. Beer should be funnelled between 4 inning games. 6 Balls equals a walk. There are 2 outs per inning per team. Two strikes or three fouls is a strike out. The home plate is a chair, if the pitcher hits the chair with the ball, it is an automatic strike, and the chair consists of the strike zone. If there are dogs or cats on the field, hitting them is an automatic out, and if the animal reaches the ball in three seconds that is an out as well. Rediculous 1970s uniforms in clashing colors should be worn. Great team names are "Sweep the leg," "Duncsnatch," and "Drago." Bragging is encouraged and referred to as self-calling.
Awesome ball is the most awesome sport ever.