n. adj. A greasy piston is a person that indulges in activity of the homosexual persuasion. Greasy coming from the chocolatey brown color of shit, and piston from the penis and it's motion in and out of another man's rectum.
A condition when sand has been accumulated inside the vagina cause the afflicted to show sparatic emotions ranging from begin depressive to flaunting his ego.
"Man, he acts so vaganalisticly on /all chat. All ways acting like he is nothing then acting like he is better than someone else."