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1.
BYB
It is an abbreviation to Back Yard Breeder
I am Not a BYB. I am just rehoming my dog for a small adoption fee.
by M Abdel Aziz October 02, 2007
 
2.
BYB
The Backyard Band native to the D.C metro area.To the bitch ass nigga/cracker who got it deleted:
........................./´¯/)
......................,/¯..//
...................../..../ /
............./´¯/'...'/´¯¯`·¸
........../'/.../..../......./¨¯\
........('(...´(..´......,~/'...')
.........\.................\/..../
..........''...\.......... _.·´
............\..............(
..............\.............\
thats especially for you.refer to fuck
The leader of BYB (big G) also plays slim charles on hbos the wire
by zxulu tha big lip bandit December 14, 2004
 
3.
Short for 'Back Yard Bong Session' or 'Back Yard Blunt Session'
Shane: "Rob just invited me to a quick B.Y.B.S with his new bong"
McDeev: "In his backyard?"
Shane: "Of course"
by McDeeverton May 27, 2009
 
4.
Boobs
I cant believe how big Miss Cucumber's b(.Y.)bs are! They make me into such a hornball.
by SAY que? May 18, 2010
 
5.
BYB
1. Back Yard Basketball
- full contact basketball in the territory of the elusive S S S
- not for the weak or timid
2. Back Yard Baseball
- endless whiffleball game in GARs yard
"Dude! re'e'er BYB?"
"duuuud...i am STILL trying to recover from games we played 10 years ago"
"ferreallydohyo"
by GAR February 05, 2004
 
6.
byb
Bring Yourown Booze. When throwing a party, say the party is "BYB" and you will attract hardcore drinkers...
Mike: "Dude, you hear that Jim is throwing a party, its BYB."

John: "Looks like another typical night that I'll be wasted..."
by Will January 06, 2005