When a girl is giving a guy a blowjob the guy doesn't say he's going to come so unexpectedly the guy comes in her mouth. She's spitting the come out making her look like a mad dog with white foam coming out of it's mouth.
"Dude totally mad dogged that trick last night!"
by Torolf September 2, 2008
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swishing a mouth full of cum around, showing your teeth, and saying "grr mad dog" while frothing white all over your face
Girl: Theres nothing i love more on a friday night than mad dog.
Boy: Oh gee.
by y3nna March 31, 2007
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synonymous with over working. Someone who extends way too much effort for their job/work. In sports when someone plays over the top hard defense when down 50 or chases after every loose ball even though the game is over. In everyday life is when a low waged worker asks hundreds of questions and tries to overcharge and harass customers. In video gaming when a gamer works ridiculously hard on one task (like they mad dog trying to kill one specific player and disregard other tasks)
The McDonald's employee was mad dogging when he launched a small scale investigation of whether water was in my water cup.

Ryan was guilty of mad dogging when he obsessively hunted his brother in Battlefront.

Wallace was mad dogging on defense despite his team losing by over twenty points with his hard and dirty fouls
by KingOfTheStreets35 November 8, 2010
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mad dogging or dogface as its called in prison is a expressionless glare ostensibly used to intimidate but is actually often a way for gay men to recognise each other if its combined with other signals such as a lock of eyes
Mad dogging is a way for men who are not obviously gay to hit on each other.
by Choybalsan July 23, 2008
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A crazy old git that sometimes gets as mardy as his arse even if you haven't done anything wrong. It's a gamble wether you're gonna piss him off or not or vice versa.
It's also a McPorritt that can't find anything to do with his hair, needs to pull his trousers up sometimes and drive a little quicker now and again.
Alan the Mad Dog
by Bobby Ovlov September 9, 2010
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When a man goes down on a woman for some of the "clam chowder soup" ya know...."eatin some sweet n' sour sushi" and she is occupying chlamydia unbeknownst to the gentleman giving her the "lap dance" of her life with his tongue. a few weeks later, the man starts foaming at the mouth, shaking his head furiously spitting the foam in a manner such as....say a mad dog? to complete the procedure one must scream "MAD DOG" in the voice of peewee herman.
Annette gave me the mad dog!!!!

Dude...i didn't wanna say anything, but wipe your mouth man, shits comin out worse than the mad dog.
by Polish Avenger July 24, 2006
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1. (noun) A person willing to perform oral sex on a woman during her period.
He is a horny mad dog.
by joedildo November 4, 2005
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