look up any word, like ratchet:
 
1.
to pass out or sleep
After the party, everyone conked out and didn't stay up past 2 am.
by DavidA January 29, 2006
 
2.
When you smoke so much weed that you have to look on urban dictionary to define how extremely high you are.
"Dude, I'm so Conked right now."

"Who are you??"

"Hopscotch."
by Battle-Cat March 06, 2010