When used as a noun it means and party involving alcoholic beverages and dancing, and when used as a adjective it means amazingly athletic.
Noun: Wassup Dawg? Do you want to come to my rumbaugh later?
Adjective: Have you seen that guy? He's totally rumbaugh.
Adjective: Have you seen that guy? He's totally rumbaugh.
by 34horseguy April 20, 2009

To be incorrect, or wrong. Also can be used as an insulting adjective to describe someone who is totally wrong.
by 34horseguy April 20, 2009
