noun: Italian or Italian-American who is born with genes to know it all and to be correct in all things, all the time.
Has strong integrity in all things he/she does and will not back down on opinion. DeMaios usually bear distinct facial features, i.e. large nose, full lips. Though respected as they mature, some young opinionated DeMaios may not achieve success in the career of choice, due to lack of business manners and the know-it-all attitude, also known as "not knowing when to shut up".
see: mouth almighty, tongue everlasting
She must be a DeMaio, she knows it all.

You can tell he's got a lot of DeMaio blood, he's right ALL the time and knows all things! Just ask him!

He's all DeMaio. Big mouth.
by numbit February 03, 2010
3 Words related to DeMaio
The fucking man. Is a beast when it comes to sports and pretty much everything else in life, is hung like a horse, pulls birds/bitches night and day without even trying.
You see that dude over there bro?
Yeah. What aobut him?
Bro he's taken 3 girls into the toilets in the last 2 hours and 2 of them were at the same time.
Holy Fuck!
Yeah.... I bet his names DeMaio, and if it's not he should change to that cause he's the fuckin man. I wanna be like him.
by birdpuller7 September 01, 2012

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