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!

by Bastardized Bottomburp September 1, 2003