Your mom 

A phrase indicating lack or amusmant in the subject or lack or paying attention.

"Hehe, my science homework is so easy (it's about space) I don't even have to read the chapter."
":P I didn't even have to read your mom last time."

Your mom by Borg April 19, 2005

your mom 

Your Mom literally means 'Your Mom'. Usually people mean it to be funny, or just because they can't crack back. So they just retaliate with the phrase "Your Mom"

Jimmy: Hey Doug, where were you yesterday???!?!?!?!
Doug: Doing your Mom, and she screamed like a whore!!!!!!!
Jimmy: That's nasty, my Mom has a mullet..............
Or...............this could happen.
Person: You're such a freaking whore!!!!!!!!!!!!
Person 2: Yeah well...... Your Mom's a whore too!!!!!!!!
Person: That is SO OLD!
T
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your mom by The Retard! April 17, 2006

your mom 

A generic response of chavs, townies, morons, intellectual insects or wiggers when they come to the pathetic conclusion that they have no better response to an insult, inquiry, or blank comment.

Example 1 -
Person 1 : Do you even know how idiotic you sound when you talk like this?
Chav : Uhh. Your mom.

Example 2 -
Person 1 : So, I heard you got a disease from some skank last night.
Chav : Yeah, your mom!

your mom by Roxanne Stone February 18, 2007

your best nightmare 

Your sexual beast of the night ;)

Charlie Fizzz is my BEST NIGHTMARE ;)She'll be your best nightmare to, Georgio ;)

your best nightmare by Rebeccyy January 16, 2009

your mom 

A phrase used when somebody doesn't know any good comebacks.

Also used as part of a joke

The woman who gave birth to you

Person1: You're so gay
Person2: Your mom

Your mom's so fat she stepped in the ocean and said 'Who put this puddle here?'

Person: I'd like you to meet your mom, Casie

your mom by Stepheli December 28, 2005

your mom 

a phrase one uses as an insult to some one.

"you are a bitch"
"your mom!"

your mom by biotch#452 June 5, 2003

your matt

Generic insult derived from the name of a young 'Gaming Legend' who, according to law, tries to 'pwn y0ur b4535', and fails miserably every time.

'Jeez, ya Matt... quit eating my motherfucking chips.'

'Haha, check out that stupid Matt over there...'

your matt by Chibiviscerator March 15, 2005