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Short for obstacle course. Often used on the website "ROBLOX".
lets got to that obby
obby by anotherusername1111 February 13, 2010
You: Hey wanna go to the easiest obby?
Noob: What's an obby?
obby by Octus The Robot May 24, 2011
Obby= o bby= oh baby.
Pronounced: aw bee.

See:oh baby,babeh.
Guy: *smacks ass*
Girl: obby!
obby by Jay :3 June 23, 2008
Hey im gonna go mine obby for our big grief on infinium
obby by SnowballGaming November 16, 2011
A klepto thief who uses piss vapour to distract you from when he steals shit.
You: Obby, you smell like piss. Hey! Where the heck is my black marker?
Obby by Bahati September 14, 2007
Slang for dickhead, loser, idiot.
Man, that skank is acting obby-ish.
Obby by SlappyMcGee August 28, 2006