To begin or start, usually associated with an event of some description.

Literally everyone, ever. Including the writer of this definition.

SCOTTISH: to become angry, aggressive or violent.

to die. (euphemism)

When fucking a girl from behind, preferably on a bear skin rug, at the point of climax one blows a whistle, signaling three or four friends to burst into the room and kick the girl in the face.