Bonged (out) phrase slang
Extremely tired as you've smoked too much cannabis.
He's smoked grass excessively with a hope to find pleasure, but he ended up being bonged out.
I found him lying on the street. He was bonged out, and his breath reeked of weed.
Said when you are too tired to do something
Completely fatigued.
Used when one suffers from mental or emotional exhaustion
Be very bored
The origin of this slang is not clear.