OB
to faint when hearing the result of an election
I was so happy on the 4th, I almost OBed
by Tatal35 November 09, 2008
OB
Older Boy. similar to Older girl or Little boy. if you are a girl and you are going out with and older boy OB.
I think i am going to the party, there will be OBs.

Are you going out with an OB?
by pooismylife May 17, 2011
Passsed the obsession with something
Shannon was totally O.B. with her Mercedes.
by Jimmy Dalts December 28, 2005
ob
Short for ; Over Board
Having or dealing with taking things to far!
Man that girl's outfit actually looked good until she went ob with those bright ass socks !
OB
Onion Booty. Used to describe a phat-ass bitch with a phat ass.

Reference www.onionbooty.com
Yo Greg, 10 o'clock your time. Check out OB on that one son ... Daaamn!
by James Werdsbond October 24, 2008
ob
short for obvious; also obvs, obv, awe, and ib
"you gunna nail that chick tonight"

"ob"
by greg bush June 13, 2008
ob
Prefix meaning "obligatory". Most commonly used when saying something otherwise offtopic in places like Slashdot where that is frowned upon. Can be used where something is expected but might otherwise be missing.
Jessica Simpson is an airhead.
ObTopic: Linux is cool.

ObDrama: But she said she liked him instead.

ObLanguagePolice: There is no such word as "alot".
by fax4voice3 December 01, 2005

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