1. a mistake, usually unintentional, which often causes embarrassment to the person who made the mistake
2. to make a mistake (see above for details)
At the fancy party, I made a Rumbaugh by using the wrong fork.
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.