A Polish term usually associated with someone who drinks heavily and is a major playa. Pronounced "doob-ai", this person has an insatiable appetite for fine women, probably drives a nice car, and can down a bottle of Goldschläger in under an hour.
Mr. John dubaj over there is out again in full force. I bet he's slept with half the tacos in this room; probably would've done more if his red sports car wasn't a two-seater. His bar tab is more than my damn paycheck!