A person, big, fat, skinny, short, ugly, heterosexual, transsexual, bisexual, smells, and possibly the definition of 'your mum'. May not always be a woman.

Sometimes a man.
Yo mama so ugly she makes blind children cry.
Yo mama so fat she had to be baptised at sea world.
by MyNameIsSlimShady August 2, 2014
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Something that provokes jokes. YO MAMA!
Something you say if someone asks you what you wanna do. YO MAMA!
Dick: What are we doing in Science today?
Dicky: Yo Mama!
Frick: Hahahahahaha!
Fricky: Shut up.
Dick: Really, what are we doing in Science?
by Garfield135 May 16, 2007
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That fat smelly bitch who cooks me dinner and licks my ass...
Certificatologist: "yo' mama better be making some good shit tonight, or I swear I'll smack that ho!"

Midget: "my mother has been dead for 16 years."

Certificatologist: "I'd still do her..."
by Dr Todd Fuquad PhD June 18, 2006
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a type of insult that is used as a joke.
Yo mama so fat when she died and tryed to climb the stairs to heaven she broke the stairs to heaven
by Landonisanidiot December 16, 2021
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