1. vulgar slang Someone with whom to engage in sexual activity; a potential sexual partner. An offensive term usually said of a woman. There's a fine-looking piece of snatch down at the end of the bar. I'm going to go over and talk to her, see if I can't make something happen.

2. vulgar slang By extension, sexual activity in general. An offensive term typically said by men to refer to such activity with women. God, I haven't had a piece of snatch in weeks! I must be off my game or something.