That's Not What Your Mom Said in Bed Last Night 

A comeback that people say when someone says, " I bet you are terrible at sex." Or other comebacks. Then that person would come back and say, " That's not what your Mom said in bed last night."

Guy #1: Your dick is probably the size of half of a raisin.
Guy#2: That's not what your Mom said in bed last night.

That's Not What Your Mom Said in Bed Last Night by jazmine1 April 19, 2018

that's not what your mother said last night 

similar to that's the sound your mother made last night. it also originated from SNL celebrity jeopardy. it was said by Sean Connery and is just another sexual innuendo.

Sean Connery: It's been a long time, Trebek.
Trebek: Not long enough.
Sean Connery: That's not what your mother said last night!

that's not what your mother said last night by gorillaguy987 May 23, 2009

That's not a boot on your foot 

This means that something isn't someone else's problem.

Person 1: "Hey watcha doing there?"
Person 2: "That's not a boot on your foot. Now leave me alone."

That's not a boot on your foot by jimminycrickety January 5, 2013

thats not what your momma said last night 

a comeback or insult saying you slept with a persons momma and she was moaning and such

your ugly thats not what your momma said last night

thats not what your momma said last night by Groundhog July 26, 2006

thats not what your mom told me last night 

A good comeback to anything.

Bully: You suck.
Me:That's not what your mom told me last night!

Chorus: Ohhhhhhhh... DISSED!!!

thats not what your mom told me last night by Same as your mother's May 13, 2005