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bicycle shaped object. a low quality unsafe bicycle, purchased at walmart or target. a crappy shitty bike. LAME.
Go get the hacksaw and lets dispose of this BSO.
by F.U.N.E.R. January 11, 2006
BSO is an Internet term,which is the abbreviation for bloody show off.It is frequently used in online forums when a poster is believed to show off himself.However,what needs to clarify is that any thread or reply can be said to be BSO as long as it is believed so.

Hibert: My budget is very limited right now and I have to save money now...the first thing is to travel less by my private jets.

John: BSO you have private jets!
by Yuka Osawa April 19, 2009
Banda de Sonido Original

Original Soundtrack in Spanish.
Yo Amigo! Usted consiguió "The Matrix" BSO?
by TheScaryOne March 23, 2004
Bud Smokers Only crew originating amongst the degenerated youth of So. California who don't smoke nuttin but the dank.
Hey, no crack-rocks here, this is a BSO party.
by Jim D. September 27, 2006
Acronym for the Boston Symphony Orchestra.
The BSO is playing at Tanglewood.
by MRT2 October 10, 2006
a group of silly people, without a future. They hang around downtown all day, smoking and shouting all over the place.

-Hey, look at those nigga's over there, aren't they supposed to be at school?
-I think so. They're problably bso's.
by arrogant zakje January 29, 2008
Bright Shiny Object. Referring to any object or idea which is so utterly compelling that it can literally suck all reason and rationale from the mind. This is a common term in high technology. First usage may have been in connection with certain birds and their love of bright shiny objects (Crows?)
"Where the hell is Eugene and why hasn't he finished the code for this project?" "He's off chasing another BSO'".
by itripn November 14, 2005