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1.
A guy with black spiky hair and a goatee who wears a red shirt. Likes to be a useless piece of shit all day and play games, throw fuckin' nancho parties, and put jelly on his hot god. Has a tendency to fall down the stairs.
Sweet Bro - i cant wait to be a useless piece of shit and play all these games
Sweet Bro - FUCK IM FALLING DOWN ALL THESE STAIRS
Hella Jeff - I TOLD YOU ABOUT STAIRS BRO!!! I WARNED YOU DOG!
Sweet Bro - IT KEEPS HAPPENING
Hella Jeff - I TOLD YOU MAN, I TOLD YOU ABOUT STAIRS!
by Captain Lhurgoyf April 14, 2010
 
2.
A Sweet Bro is a guy who wears Polo shirts or other preppy clothing, who is generally a jock who is obsessed with how he looks but acts like a tough guy. A Sweet Bro will constantly say "Sweet Bro" to pretty much any thing. Normally Sweet Bro's walk slower than normal and walk flexed trying to appear bigger than they are. The car of choice for the Sweet Bro is the Civic or Cavalier. A Sweet Bro is a guy who is a combination of Jock, Prep, and Partier.
Bro 1 - "Yo man, did you go to that party last weekend?"

Bro 2 - "Yeah man I got damn drunk and went around playing grabass with the rest of the football team."

Bro 1 - "Sweet Bro."
by Joe Gray June 02, 2005
 
3.
Sweet bros are a sub-group of the larger and more well-known Douche bag group. Sweet bros are differentiated from the rest of the douche bags by their frequent use of the phrase, "sweet bro" ("how are you?" "I am great" "Sweet Bro."). During the fall and winter months, sweet bros can be found all over the country in their respective homes. However, in the summer they migrate to large metropolitan cities where they engage in "summer sales" where they prowl neighborhoods, going door to door, selling Satellite television service, Pest control, or Security systems. It is important to note that if you are ever approached by a Sweet bro, it's likely because he wants to try and convince you to do summer sales as well so as to increase his pay grade. If this happens, hold totally still; their vision is based on movement. Sweet bros employ many of the token douche bag practices such as fist bumping, staring at themselves in the mirror at the gym, and shopping at Abercrombie and Fitch.
Does that Sweet bro know his hat is cocked slightly to the left?

That guy was a total Sweet bro.
by Cloakt1 July 08, 2009
 
4.
A guy that thinks he's the shit, and spends way too much time in front of the mirror. He puts tons of gel in his hair, and usually has at least one earring. He is the guy who rolls up his short sleaves and puts cologne on to go to the gym. Generally in a frat.
That sweet bro over there checking out his own biceps is totally fratastic.
by G May 16, 2004