Cooch Cannon 

Where you put as much mentos and coke in a woman's pussy as you can. Sometimes followed by putting your dick in for as long as you can.

I tried giving my girlfriend a cooch cannon the other day, I should try it more often, she screamed a lot!

Cooch Cannon by zomgwtfbbq November 5, 2006

Canyon cooch 

A vagina that is streched really wide and loose, usually as a result of promiscuity

After screwing every guy she met all summer, that blonde developed a nasty case of canyon cooch

Canyon cooch by Hilarion Tada December 20, 2010