Definitions by LitBot

obby 

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.

obby by LitBot May 7, 2018