Your move

Whenever you deliver a witty remark to someone, and completely burn them, you say "Your move, sir/ma'am"

Some dude: Your mama is so stupid, when she threw a rock at the ground, she missed! Your move, dude.

Some OTHER dude: CHECKMATE sir!

Your Mother

literally "Your mother". A derivation of yo mamma, used as a joke insult for any occasion. It doesn't have to make any sense at all and can be part of a phrase. Often used in a sexual context.

Bob: What'd you do last night?
Bill: Your Mother.

Bob: What did you think of that movie?
Bill: Your Mother

Bob: I'm getting tired of this.
Bill: Your Mother didn't get tired last night.

Your Mother

A crappy comeback (yet effective if used right) to say if you can't think of a good one.

Guy 1- Yo you suck at this
Guy 2- Your Mother
Guy 1- -_-

Your father

This definition could not be found.

“Your father went out tho the store to buy some milk. It’s been 14 years.”

Your boi

The highest level of respect you can give your friend

You have your friend, you have your best friend, then you have your boi

Your Mom

Why you should listen to the teacher in class.

(teacher finishes lecture)
Teacher: Okay now students, you may now begin your work.

Ben (whispering): Hey Chris, what are we doing?
Chris: Your MOM!!

not on your nellie

a shortened version of "Nelly Duff". Nelly Duff = puff (breath) in Cockney rhyming slang. 'Not on your Nelly' is used to mean 'Not on your life'. "Breath" is synecdochical for "life"

See:
http://www.english-for-students.com/Cockney-Rhyming-Slang-N.html

Steve

There is no way you are going to get money out of me. Not on your nellie.