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.
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).
Precedes or follows either a gratuitously disrespectful or honest remark, originated in New York City. Used in similar fashion to "no offense" or "to be honest," interchangeably.
Ya mans is wild buns, respectfully. Respectfully he's washed.
After school, The Modells on Jamaica Ave was active. Respectfully.