look up any word, like wyd:
 
2.
Bad sex is when the sex is not worth using a new condom, much less the time you just wasted taking your clothes off.
Scarface was so horrible last night, I kicked her ass out of bed and used her sock to wipe my junk. Then went to the bathroom to finish by myself. That gave a new meaning to bad sex.
by sweetness2202 June 11, 2008
 
1.
While some would call it an oxymoron, when copulation isn't as satisfying as masturbation and feels like work, that's pretty bad.
The spam promised an end to "bad sex" for only $19.95 plus shipping.

"Are you done yet?"
by Anon April 19, 2005
 
3.
A negative description expressing appreciahation, (ill sentiment, dislike) of a person, place, or thing.
(As made popular by http://thegoodsexblog.blogspot.com)
"Ah dude I stepped in dogshit!"

"That's bad sex man."
by Jack Yeah August 05, 2008