Top Definition
When a girl is on her period and she is trying really hard to push out a poo but all that pushing causes a big shot of period blood and chunks to fires out of the other hole instead.
"Aw man, I was trying to take a dump but the chunk gun fired instead."
by lollieostrich October 27, 2013
Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.