GDIT

God Dammit, it's Trevor

Ed: I think that's James walking up
Eddie: No, GDIT!
Ed: What?
Eddie: God dammit, it's Trevor

NWSMD

Short hand for a common condition for people who can't remember anything for no reason.

No Weed Stoner Memory Disorder.

D: What time is dinner
A: Really you forgot?
D: You know I suffer from NWSMD, I can't remember shit