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In Roblox, a obstacle course.
In Minecraft, obby is short for obsidian, commonly used on faction servers.
Roblox:

Player1: Hey kid, do you want to play a obby?

Noob: N0 thx m8 i b4d at 0🅱🅱ys xD lit saveage famm

Minecraft:

Player1: Anybody selling some obby? I need to build a new base.

Player2: I'll sell ya a stack of obby for 50,000.
by LitBot February 18, 2018
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May 13 Word of the Day
lil mad is like big mad but the opposite, you mad but not mad to the extent of pullin somthin
"look im sorry i ate your food"
"is cool im just lil mad"
by lilbabiey November 30, 2018
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3
You: Hey wanna go to the easiest obby?
Noob: What's an obby?
by Octus The Robot May 01, 2011
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4
Obby= o bby= oh baby.
Pronounced: aw bee.

See:oh baby,babeh.
Guy: *smacks ass*
Girl: obby!
by Jay :3 June 23, 2008
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6
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?
by Bahati September 04, 2007
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