The bond two men share after they have sex with the same girl at the same time. i.e. threesome. This is a bond that can never be broken.
by MyChemicalBromance December 9, 2010

Similar to Blood Brothers, where two best friends stand back to back naked from the waste down. Cheek to cheek they bend over and force out a poo each. When the poo meets in the middle it becomes one symbolising the unbreakable bond of poo brothers.
You're the coolest friend I could ever dream of, do yuu want to be Poo Brothers? You know what they say..... Poo is thicker than water
by JungleFaceJake January 8, 2013

A blumpkin involving two men. Also called a brother blumpy.
Also see reverse blumpkin, reverse brother blumpkin, cunnilumpkin, and reverse cunnilumpkin.
Also see reverse blumpkin, reverse brother blumpkin, cunnilumpkin, and reverse cunnilumpkin.
Ever since my butt hymen was broken, it's been much easier to execute the brother blumpkin with my buddies.
by Angry Hippie October 30, 2004

The undercover love interest of a woman who is engaging another man outside her marriage or relationship. To her husband, this extra guy is a friend (play brother), when the truth is she and this "play brother" may have been intimate in the past, but the relationship did not work out.
by D.E.L. December 30, 2011

gay, annoying people (except for kevin because he isn't a selfish ass.) they have no lives and somehow people still like them. some good songs but whatever.
by poopcrack February 4, 2009

A close friend with whom you take mind altering substances. This frienship is often strenghtened by a strong psychic connection, caused by hallucinogenic and euphoric drugs.
a.k.a. "Drug Buddy"
a.k.a. "Drug Buddy"
by CRWK April 5, 2006
