Day Man is a fictional character from a song created on the television series "It's Always Sunny in Philadelphia". Day Man is the champion of the sun, he is a master of karate and friendship for everyone. He is also the arch nemmesis and fighter of the Night Man
Dorothy: Have you heard of the Day Man
JB: Hell's yeah girl, he's the fighter of the Night Man, he's a master of karate and friendship for everyone!
by Brock Heron October 18, 2007
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Day Man, the Champion of the Sun, is also a Master of Karate and Friendship for everyone.
by Macabre Miss August 5, 2009
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A concept focusing on the idea that modern men are different to men of previous "ages". For example more care is taken with appearance and activities. Rugby lad culture is rejected. Links to metrosexual.
Wayne, Yo and Nic are modern day mans, however Jack is still a rugby lad.
by Nic123456 June 3, 2007
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A day held on the Saturday of the NFL draft. The day typically consists of drinking a large amount, eating greasy food and placing illegal bets. Competitions, such as horseshoes, video games and beer pong are held on the day. Participants then watch the NFL draft at a local watering hole. Participants are obligated to leave wives and girlfriends at home. It's basically a bachelor party except there's no real reason for holding it. On a typical Man-day 30% of the men puke and .005% die from drinking too much.
Dude, you hear Josh Douche died last Man-Day?
by Man-Day Inc. April 9, 2008
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Noun; refers to the day when a group of guys get together and forget about their problems and girls. Men only, no women. You are not allowed to text or interact with women during the time you are with your friends on man day. Rock band is a common game played on man day.
Shakur: Man day tommarrow at mikes house.

Mike: no julia!

Kevin: ok
by tama15 January 26, 2009
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The day after Valentine's Day, To complete the day the man must drink an entire case of beer to himself, get into a fight, watch nothing but Rambo, Kung Fu, Rocky etc. Eat nothing but steak (unless it is an animal you hunted yourself)
I got so fucked up on Man Day but it was so worth it because I kicked that dudes ass.
by C Smitty February 15, 2008
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Another word for Super Bowl Sunday. The only Sunday of the year when all men must eat a variety of animals (as close to living as possible), be waited on hand and foot by their women, get to watch TV all day, drink beer until they fart, AND call into work the next day. Blowjobs are optional but expected if your man is rooting for the winning team. The only downside: 8 woman in a room cooing over commercials.
"Dude Man Day is coming!"

"You're right! Let's get sh*tfaced!"
by Batman Bin Superman February 19, 2010
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