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1.
A term refering to somones mother. Sometimes used as a 'come back' for other jokes.
Somone Says: You Suck!
You Say: Yo motha!
by Taro January 18, 2004
 
2.
offensice word regarding a person's mother
you fat ugly slutty-ass cunt!
nah yo, yo motha
by ViTaMiN E July 20, 2003