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Rumper Dumper 

Rumper Dumper (Or Rumpy Dumpy) refers to a HUGE ass. I'm talking giant butt. Milked up butt cheeks, the whole nine yards.
Johnny: "I've never seen a man with an eighty-pound Rumper Dumper."

Rupper Dupper Der 

What retarded people say when they finish a sentence. They usually say it underneath their breath.
Retarded Teacher ~ You Boys GET TO CLASS!!! Rupper Dupper Der...