Thisus A. S. Yudonum's definitions
Marshmallows that an extremely attractive female deficates when a man hits her G- Spot during sexual intercourse; may occasionally taste like cellery.
Dude, check this shit! When I was boning your sister last night, she came so hard she totally busted a buttmallow!
by Thisus A. S. Yudonum April 22, 2009
Get the buttmallow mug.