Top Definition
A combination of retarded, dumb, and ridiculous; sometimes said as a cover for when saying "retarded" isn't okay.
"She is so redumbulous it hurts."

"Oh my god, he's so reta---uh, redumbulous!"
by Lovette Cher February 27, 2010
When something is more then stupid, it can not be described as rediculous cause its just that dumb.
That shit wasn't crazy, it was redumbulous.
by claymenia September 25, 2009
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