A police officer. Old 70s Irish-American slang from New York.

Origin: "Muldoon" is an Irish surname.
Some fuckin' muldoons broke up my party last night.
by sexual mystery December 10, 2014
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a Muldoon is a male between 25 & 75. They rarely exceed 140 lbs. No job, cut off jeans, trucker hat, stolen sunglasses, cheap tennis shoes or flip flops. Tee shirt usually advertises a national brand beer. His most prized posession is his customized cruiser bike with a seat with springs & high handle bars - 1 speed with coaster brake & a plastic cup holder. Muldoon drinks canned beer in a paper bag.
The Muldoon has an incredible memory for bullshit trivia. Favorite songs include "Hotel California", Maggy May", & "Heart of Gold". Often found in Key West, Hatteras, Margate, NJ,... Ft. Lauderdale is Muldoon Mecca. Muldoons avoid the beach and more often frequent the docks, municipal jail cells, & emergency rooms. The Muldoons girlfriend is a Patti. Pattis have pretty faces with red noses, saggy titties,a hard gut, square asses, and skinny "drinking legs". Pattis are light hearted, Muldoons are often melancholy... under the boardwalk is not just a song, it's a way of life!
Bubsy: Hey, what happened to my beer?
Ed: That Muldoon asked if you were finished & I gave it to him.
by the wetspot March 28, 2008
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To work an eight hour day regardless of whatever crisis your employees are working on.
I don't care if it gets fixed today, I'm working a muldoon.
by Esphincter December 1, 2006
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A hairy disgruntled mook from sweden
There was a young fellow named muldoon who ate a great roach then fell off the coach, and never was the same again
by Anonymous October 5, 2003
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Completely smashed on alcohol and/or other intoxicants
I was completely muldooned last night
by Chris Hume December 24, 2003
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The action of feeding someone booze well beyond their limit. Muldooning can produce various results, including but not limited to feelings of ecstasy, forgotten evenings, expensive cab rides, general dizziness, and corporal bruising/laceration.
"I got Muldooned last night, I don't even remember leaving the bar."
"Man, you were hitting on every girl in the bar last night, even the ugly ones. You totally got Muldooned"
by rudabaugh February 1, 2013
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