1) A group of jokes meant to criticize one's mother by saying that she is fat, ugly, stupid, etc.

2) A lame phrase someone I know keeps saying whenever I ask him a question about PE because he has it before me.
1) Yo mama so ugly people watch her during horror movies.

2) Me: Hey, what are we doing in Pe today?

Him: Yo Mama!

Me: Shut the f up.
by army_azn December 09, 2004
Lowbrow humor at its finest.
Yo mama so old, Adam and Eve were telling mama jokes about her.
by Simon Says Go Fuck Yourself February 16, 2004
is so fat shes got more chins than a chinese phone book
yo mama is so stupid she got stabbed in a shoot out
by chapelle April 03, 2004
Your mom An insult... like those "Yo Mama" jokes. An insult to people's families.
"Yo mama so fat, the last time she saw 90210 was on a scale!"
by Mistukai_O_Kuroi August 31, 2004
yo mama so stupid she went to bed with a ruler to find out how long she slept

yo mama so stupid she climbed over a glass wall to see what was on the other side

yo mama so fat she needs to watches one for each time zone
yo mama like a lightswitch any one can turn her on
by godofthunder890 December 21, 2003
1: a pitiful insult used when people can't think of any other retort.
2: used to offend retarded people when you want to get in a fight with them
3: a pathetic joke people say in 4th grade, then bring up again in 10th and get beat up.
1: amy-you're so ugly!
gwen-yeah well so's YO MAMA!!!
2: tommy-hey yo mamas a HO!
billy-what did you just say about my
mama?! wanna start a fight punk?
3: yo mama's so fat, when she jumped into the ocean, the whales started singin' we are family!!
yo mama's so dumb, she returned a donut cuz it had a HOLE in it!!!
by nikki November 23, 2003
A joke consisting of the specific phrase, "Yo mama (is) so---". It is an amusing, yet degrading style of joking. Use it when you are mad at someone!!!
Yo mama be so fat, she got baptized in Sea World.

Yo mama so greasy, she sweats Crisco.

Yo mama so big, when she was floating in the ocean, Spain conquered and claimed her as their New World.

Yo mama so big, she uses a paint roller to apply lipstick.

Yo mama so greasy, Texaco buys oil from her.
by No Name Entered December 29, 2007
Literally means your mother. It is sometimes used for mockery or insults. For example:

Guy 1: Guess who's gonna kick your ass?
Guy 2: i know who's gonna kick yours.
Guy 1: who?
Guy 2: Yo mama. Aha!
by MOshizzle November 22, 2007

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