This usually happens from too much drankin'.
While sitting on the pot after having filled it to the brim with butt mud, the smell becomes so sickening that you are forced to swing around and throw up into the bowl, thus turning 180 degrees.

A way of killing oneself with two guns.
Both guns are put either at the top and bottom of one's head or the left and right.
If the bullets collide, it is a for sure death.
Does not assure 100% death, as the bullets travel through similar parts of the brain.

a school full of treeshs & drug dealers famous for having sex in co-op city staircases.

I thought 187 was murder.
To rotate 180 degrees on a snowboard or skateboard or anything.

The code used by police in the US for a murder

When a man is about to cum, and a girl turns his dick around 180 degrees and makes him finish on himself.

180 is the highest score possible in the sport of darts. A player must land all three of his darts in the "triple 20" area of the dart board.