When your mind is racing one hundred clicks an hour and you can't think of the proper word you call it a whohaa. A word that you are trying so hard to say and it's at the tip of your tongue and you cannot remember the word is called a whohaa. When you are explaining shit and it don't mean shit is a whohaa. Describing a girl that you couldn't give a crap about her name is a whohaa.

A person or people that purposefully causes chaos or mischief within a group for the sake of entertainment.