Definitions by beanerman

guamanation 

1.(noun)After having doing a girl up the but you decide to piss in her ass resulting in an awesome gumanation.

2. (verb) too pee in a girl's butthole

Person A: Wow molly got a guamanation last night

Person B: Man i knew that girl looked like she could take a gaumanation!

guamanation by beanerman April 17, 2008