smees

Basically "seems" but misspelled. It can mean anything depending on the context.

Alex and Josh are Friends, but Alex was arguing with Tim:

Tim: Hey, wanna meet somewhere?
Alex : smees
Tim: ok loser

Josh: wanna hang out later?
Alex: smees
Josh: great, cya later

Amy's grandpa died:

Amy: My grandfather just died
Hannah: smees
Amy: thanks, you're a good friend

A heated argument between Billy and Eric:

Eric: Your mom is gay and you stink, you dumb asshole
Billy: smees
The Crowd: Oohhh, burned!