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1.
a very harsh insult/come-back
yo mamma so dumb she failed a blood test.

yo mamma so fat when she turned around it was her next birthday

yo mamma so dumb that if she spoke her mind she would be speechless.

yo mamma so stupid she got fired from da m&m company for throwing away the w's.

ypo mamma so fat that her drivers liscenc picture say "picture continued on other side"
by Rabi J. February 05, 2005
 
2.
1 the answer to all questions
2 that fucktard i saw in the zoo
police:what were you doing saturday night?
suspect:yo mamma

by jeremy21144 February 12, 2008
 
3.
the best comeback that was ever made
yo mammas so fat she went swimming with the whale and they sang " we are family even tho ur fatter than me"
by punkass kid March 10, 2005
 
4.
Insult, last resort in a verbal confrontation, snap among friends.
Yo mamma is so broke that she got a pussy on her hip so she can make money on the side.
by hotboxin November 25, 2005
 
5.
It is an overly used gay joke that disses someones mom. Came from the show Yo Mamma
Yo mamma is so stupid she was talking into a letter trying to send voice mail.

Yo mamma is so fat the last time she saw her phone number was on a weight scale.

Yo mamma is so fat that when she was sitting in the road i tried to swerve around her but ran out of gas

Yo mamma is so fat the when she walked past the TV i missed 3 episodes of my show.
by mammasatonadildo December 20, 2010
 
6.
Stupid ass and overused jokes that revolve around your mom's weight, intelligence, and overall life. Not only they're are stupid, but they're sometimes offensive.
Guy 1: Yo mamma so stupid, she thought the Super Bowl was a large bowl of cereal

Guy 2: WE HAVE THE SAME MOTHER, STUPID ASS.
by Assface McFucker September 21, 2013
 
7.
A person who is so stupid that she started at a box of orange juice for 20 minutes because it said "concentrate."
Yo mamma's so stupid, she got hit by a parked car.
by dj gs68 August 23, 2003