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1. n. A lame term used for "Bring your own beer". Typically used when a party thrower doesn't have enough money to throw a real party.

2. n. A kick-ass song by System of a Down that sings about current events, feelings, and parties. For this version of B.Y.O.B, it means "Bring Your Own Bomb".
"Hey man I'm throwin' a party tonight, BYOB."

"Wanna headbang to B.Y.O.B.?"
B.Y.O.B. by PenalMaster May 25, 2005
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B.O.S is an abbreviation for Big Ol' Softie.

A B.O.S is a guy who pretends to be tough but is actually very sensitive if you can get past his emotionless facade.
Girl #1: I heard he is self-centered and doesn't care about anything but sex.

Girl #2: Nope, Coty is a B.O.S!
B.O.S by Redchestedbirds July 3, 2011
A person's natural underarm odor.
So-and-so has B.O., because he doesn't use deodorant.
B.O. by Anonymous August 24, 2003
Bring your own bitches/bombs/bottle/beer/boozes/blanket/boobs/beans/baby/booty

it can mean anything

what ever your heart desires
we are having a get to together B.Y.O.B or anything that starts with a ...B
B.Y.O.B by Mr. BigPimpin January 23, 2011
same thing as “goat” (greatest of all time), but it’s “Bottiest Of All Time” meaning ur complete dogshit like the doodoo kine
yo, imnobody is a b.o.a.t damnnn

i’m not a goat, i’m a b.o.a.t
b.o.a.t by vUncle June 22, 2019
Thugged Out Beyond All Recognition - referring to a person, place or thing that is a little to ghetto for ones liking

(derrived from FUBAR)
Dude, that black guy over there with the Mr. T chains on and the fireman boots on is TOBAR
T.O.B.A.R by Craw Diddy June 5, 2004
One being of a bad-ass stance. O.B.A. is slang for "Official Bad-Ass." This term can be used to congratulate one for being recognized as an official bad-ass.
Wow, you just ate a whole pineapple, you are totally an O.B.A.
O.B.A. by kill-o-wattz May 14, 2008