Yeah, well your mom was really good last night 

A comeback, usually signifying that the person saying this phrase can't win the argument.

"Go fuck yourself, you piece of shit whore"
"Yeah, well your mom was really good last night"

Yeah, well your mom was really good last night by Assholes Inc. September 10, 2003

Yeah, well your mom was really good last night 

1.The universal comeback*.
2.The comeback to end all comebacks*.
3.The most overly used comeback ever.

*in theory

"Well. . .Your an asshole. . .asshole."
"Well, Your mom was really good last night."
"Dammit"

Yeah, well your mom was really good last night by Fatass February 13, 2003

Yeah sure, sounds really good, okay 

A passive-aggressive response to an annoying person, usually a customer or co-worker.

Customer: I can't believe I have to pay extra for guac!
Employee: Yeah sure, sounds really good, okay.

Yeah sure, sounds really good, okay by #Farmers_Tan February 1, 2017

Yeah, well your mom was really good last night 

Ok if you leave my mom out of this
Ill leave this <point at ur member> out of your mom!

ComeBack for most your mom jokes

Yeah, well your mom was really good last night by GUY November 27, 2003

Yeah, well your mom was really good last night 

a comeback

"Cracka I just whooped yo sorry ass in that game of checkers. BOOYAH BITCH!"
"Yeah, well your mom was really good last night."

Yeah, well your mom was really good last night by Nick D February 13, 2003

Yeah, well your mom was really good last night 

Another alternative would be "Your mom was easy"

<Hickery> Haw haw! I pwnz0red j00 in teh Chess!!!1!!1!!2 j00 is teh too easy!
<Dickery> Well, your mom was easy.
<Hickery> Oh my!

Yeah, well your mom was really good last night by Bastardized Bottomburp September 1, 2003

Yeah rally

when you see a vehicle that would be intereesting to take on a rally course or to go off roading with it

Guy one:hey, check out that crane truck
Guy two:YEAH RALLY!

Yeah rally by Matt Furlani October 6, 2003