White suburban males, usually 16-25 years of age, hailing from anywhere, USA. Characterized by their love of College football, pickup trucks/SUVs, beer,cut off khaki cargo shorts, light pink polo brand shirts (with collar "popped"), abercrombie & fitch, hollister gear, and trucker hats. Favorite bands include, but are not limited to, O.A.R., Jack Johnson, Dave Matthews Band, Avengened Sevenfold, The Fray, and often crappy radio rap (i.e. Nelly, Dem Franchize Boyz, D4L, etc.). Dude bro's are incredibly insecure in their manhood, which makes them: insanely jealous of their girl friends, overly macho, and laughably homophobic. currently, there is no cure for being a dude bro.
6 out of 10 guys at any predominantly white mall in america.
a "dude" can be positive,
a "bro" can also be positive,
but a "dude bro" is never a good thing.