This term is used when you are talking to someone about another person but cannot think of their name at that very moment. You use this to kind of 'stall' and keep the conversation going at that very moment. Later, you can replace it with the name of the person you could no think of during.
Person1: Last night ole' muckle buck fell in the fire!
Person2: Who's muckle buck!?
Person1: James, I couldnt thinkk of his name.
Person2: Who's muckle buck!?
Person1: James, I couldnt thinkk of his name.
by mck56 April 18, 2009