1) A person who a lil freaky and looks forward to freaky sex.
2) A person who refers themselves as a "non-virgin".
3) Sexual activity engaged inwierd places.
1) The boy Tonio down the street is a lil nasty nasty.
2) Stripton` a nasty nasty because he sent to me how he got laid last night by mistake.
3) Charlie and Tamicia were doing a lil nasty nasty in the corner of the pool.
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