What is Guamanation?
1.
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!
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1.
A retort best used to embarrass an obvious, overcompensating ass.
Can be combined with slangto form a more vulgar and effective insult...