Noun: human or animal rectum utilized as a temporary receptacle for the concealed transportation of contraband or illegal items through a zone or period of inspection for such items, most especially at international airports and during international flights.
"Gary really had to keep it undercover for like 6 hours, but his carry on bag didn't let the band down."
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.