What is Msy?
1.
Masterbating to the Sounds of Yanni
-You wanna do something tonight?
-No, I'm gonna be busy.
-Doing what?
-MSY!
See
2.
Masterbating to the Sounds of Yanni; often used to mean "nothing much" or "just screwing around"
Hey, what are you doing tonight?
Nothing much, just MSY.
Cool.
Hey, you busy?
No, just MSY.
Oh, I see.
See
Random Words:
1.
A lass who achieves eternal youth and verility by slurping up his girlfriend's period blood
Brittany: Honey can you pick up tampon..