look up any word, like the eiffel tower:
 
1.
an experience or thing that is unpleasant
As Tyrone bit into the hot dog from the vendor on the corner he exclaimed, "Man, this is some nasty!"

When Bob smelled the brown stuff on his hands and realized what it REALLY was, he shouted "Dayum! That is SOOOOME nasty!"
by Carolyn West June 21, 2006
 
2.
when someone just got embarrassed or put through a a bad situation
Ughhh...dont get dunked some nasty
Ughhh...dont get j'd some nasty
Ughhh...dont get blocked some nasty

or dont get crossed some serious
by doctor lerch November 14, 2007