The question yelled by a person who has just done something amazing. If anyone answers by yelling 'You da man!' then this person has succeeded at being awesome. However, if nobody answers then this person has failed.
by LeggyBerg December 16, 2011
Get the Who da man?!mug. "hey guys guess what i bought from Ebay? The Bucky O'Hare DVD!!, Who Da Man???" "Wow!!,you da man!!"
by piemaster August 5, 2004
Get the Who Da Manmug.