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1.
A person who likes to tell 'Ya Momma' jokes.
Person 1: Sorry for the yeasty smell.
Person 2: That is what Ya Momma said to me last night. Boo Yah!
Person 1: Man, you are a real Mummery.
by soilduck February 23, 2009
 
2.
1. The act of being a Mummer.
2. Someone who has just made a complete and utter fool of himself in public.
1. There is much Mummery on the streets on Paris.
2. Did he just say that? In front of everyone? My goodness he's made a right Mummery out of himself now
by webreakeasy May 20, 2006