your mom is a joke format that people use to make the other have to come up with a comeback
your mom is so fat she made the earth go out of orbit
The largest object known to man, being an estimated 7 times larger than the Universe itself.
Person: Hey did you hear that they recently got photo evidence of your mom being larger than the Universe?
The person I'd love to fuck every night.
"I want to fuck your mom"
"I fucked your mom"
"I fucked shit out of your mom"
The most common comeback ever in history.
Person 1 : What is your favorite color?
Person 2 : Your mom is my favorite color. ;)
What you say when someone asks you what you're doing
Jeff:"hey, what you doing this weekend?"
Tim:"your mom!!!"