Nasti is when something is gross, or nasty, but when you add the "i" at the end, it becomes slutty-ier.
Bob: "That girl Candi is sooo nasti"
Jimmy: "True dat brotha, nasti!"
Used often by Marines, as a noun, in reference to individuals that do not meet Marine Corp standards. Generally in reference to physical fitness or appearance.
"'If any of you nasties set off one of these in the dark . . ." Keeping Faith, John Schaeffer and Frank Schaeffer, Carroll and Graf distributed by publishers group west.
"...that is of course if you nasties have what it takes to become part of my beloved Marine Corps. Get some!" mavericmarine, http://www.leatherneck.com/forums/showthread.php?t=33597&page=3
"If you hated the Marine Corps until you got your $30 grand, then all of a sudden you were a motivator, you will eventually fade back into the realm of nasties." warrior0369, http://www.militarytimes.com/forums/showthread.php?t=1559730
When somebody is out of cigarettes and they rip up a bunch of cigarette butts and re-roll them into a whole cigarette.
"Hey do you have a smoke?"
"No dude, I haven't had any all day and I've been needing one so I even rolled a nasties."
Something that is really cool or "sick". Phrase used to describe some one that is good at something.
1. That car is nasty!!!
2. Damn, Chris is nasty at hockey!!
when you start the night by drinking a lot of beer, then continue to smoke pot only to return to drinking again then back to pot
man wees we got super nasty last night, what the hell did we do?
something that is very excessively good.
"Get any nasty albums in the mail today Dwight?"