1. Not literal, its the dubious item you find in ur pocket the morning after a night drinking, particularly mind-boggling when u have the biggest hangover in existence.
2. The act of hiding things on drunk people so that when they wake they are completely baffled as to where it came from.
1. "Dude, I found some whacked out shit in my pockets this morning.."
"Aahh... a domino pocket"
2. "Dude, I domino pocketed some skunk on this guy last night, hes gonna freak out!"