Essentially used to mean anything crappy or shitty.

essentially calling someone a shit stain. a worthless person.
stainy: someone who is shitty, neglectful or bad

Another word used for weed.

A somewhat attractive young woman with above average "junk in the trunk" who inadvertently walks in such a manner that allows her male coworkers to discover stains on her undergarmets, most likely caused by a partial "wedgie" which has absorbed vaginal discharge. Although the size of the stains are somewhat debatable, they are undeniable.

A crazy, completely out of control bad mother fucker. One who pushes the limits while still fooling authoritary figures that he is still a saint. Stives to be like Prateek.