a very nice way to tell someone to be quiet because you're sick of them talking. Usually slurred out when saying. It's quite nicer than saying "Shut the fuck up bitch."
Very useful
Cindy: So omg i was at the mall yesterday and i bought these new shoes omg they were so adorable and i was like these are pink and i like love pi-
Grace: aaand you're done.
I term meaning "You are fucked" or "There's no way out". Often applied to non-severe issues such as a flat bike tire. However, it can also be used to taunt a friend when they encounter an legitimate reason to worry.
Another use implies threat.
Use 1
Person 1: "Dude, that ugly girl asked me out and I was so drunk I said yes!"
Person 2: "You're done son."
Use 2
Person 1 spills hot coffee all over some douche bag at the food court.
Well shit. You must be garbage to be told this. You must have absolutely lost a competitive match, or someone gave you the biggestroasting session on life.
Dude1: *says some stupid shit*
Dude2: “You’re done”
Dude1: “What you mean? It ain’t that bad.”
Dude2: “Get fucking obliterated kid.”