coo-coo and cuckoo
mod. unconscious.I socked him on the snoot and knocked him coo-coo.Rocko was cuckoo for a minute; then he was up and swinging.
gone and gone under
mod. unconscious.He's gone. Prop his feet up and call an ambulance.He's gone under. You can begin the procedure now.
half under
mod. semi-conscious.I was half under and could hear what the doctor was saying.I was afraid they would start cutting while I was only half under.
out of it
mod. not in with the real world.You never pay attention to what's going on. You're really out of it.Fred is out of it most of the time. He even looks dull.