Top Definition
being all around crazy and or stupid (either in a god or bad way)
Good way: "Yo man, you were straight rumblin at that party last night!!"

Bad way: "Dude. Chill out. Quit rumblin. you're pissing me off."
by Jimmy Jazz92 April 22, 2009
1 more definition
When an anus disperses a gaseous cloud.

Described as a rumblins!
When she bent over I sensed the rumblins of a storm.
by Oddphase February 19, 2006

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