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A person displaying extreme acts of idiocy. This person is the DUMBEST of the dumb.
Rumrass, a person who is most likely mentally challenged.

John: "I lost my phone!"
Joshua: "Where did you leave it?"
John: "I think I left it at school."
Joshua: "Your such a rumass!"
Rumrass by TheAbominable October 24, 2016

rumpasoreus 

He is sure being a Rumpasoreus Rex.
rumpasoreus by kgv-1 July 11, 2017
To crash or destroy somthing, also known as going wild.
John just went rampass into that fat bitch.
rampass by Brett Poopinstein April 27, 2008

Rumpussy 

Rumpussy ; Justin Rivers
Yo' rumpussy get over here!
A camp homosexual man who wears a pink bra, has a pink afro and can kick some serious butt.
rumpuss, gay, homosexual, pink
Rumpuss by rumpuss January 25, 2009

rumpastumpadoodle 

A cockroach shaped person that eats a lot of peanut butter and is really annoying. Idiotic most times as well. They are really immature and gullible.
That weirdo rodrick is such a rumpastumpadoodle..
rumpastumpadoodle by 89@lel January 11, 2021