When a man takes a woman from behind, yells “MERICA” and slaps her ass so hard it leaves red and white stripes (flag), pulls out to ejaculate the Stars for the Stripes.
Used often by pre-teen girls on twitter, "Mother Rumpin" is often used as a way of saying "mother fucking" or more literally "I'm scared to swear on twitter because my parents insist on following me." Often used while tweeting the pope, can be directly translated into latin as Mater Caudam. Girls who use this expression often have a liking for furry animals such as dogs.
@liz_gardener: Ain't nobody fresher than the Mother Rumpin pope
A term of endearment. Often given to an object of affection who is unaware of the existence of the endearer. It is said that no finer compliment can be given to a proper lady of the night.
Damn. Check out that neon tank top. Wait a minute. There's nothing underneath. mmm. Mmmm. Bumpy Rumpkins, son. Bumpy Rumpkins.