Dad: "Jimmy I know you smoked last night"
Jimmy: "What? How did you know?"
Dad: "...Well I came into your room to tell you I was home, and then I couldn't wake you up. Looked like you were having some pretty good dreams. That's stone sleep for ya"
When you have hardly had any sleep and you feel weird and say a bunch bizarre things and laugh about stupid shit. You seem high, but really you're only sleep deprived.
person 1: morgan's acting really weird!! is she high or something!
person 2: no man, she was up late studying for a test, she's just sleepstoned