When a guy dances with a girl who is having her period and the blood leaks through and gets onto the guys jeans. This blood stained fellow is now blood brothers with the girls current boyfriend.
by Mr. Nuguuyen November 29, 2007
Dude, you won’t believe it, I slept with Alexis last night. It was great but I think she was on her period. Same thing happened with Jeremy last month, that makes us Eskimo Blood Brothers.
by Vulpix May 31, 2021
A secret kept between two friends of any gender. The difference between a regular secret and a blood brother's secret is that a B.B.S is taken to the grave with both people.
Person 1: Hey, don't tell my girlfriend about what happened last night
Person 2: Sure thing, blood brother's secret.
Person 2: Sure thing, blood brother's secret.
by giraffe112 September 26, 2015
by Penguy1738 November 29, 2016
by Lilron325 December 6, 2017
by KAY$OLO November 13, 2017
A sexual act. Performing a Double Penetration with a relative or a close friend while the female is on her period
by Cubsbball25 May 29, 2019