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
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug