OBC
In Roblox, OBC is an acronym for Outrageous Builders Club, which was an old form of Roblox membership which was the highest possible tier.
→ Example Usage
Chat with Friends: "Did you ever have OBC? It was the best!"
Reminiscing: "Back when I had OBC, I had access to so many cool items!"
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Also Know The Meaning Of
Obj
In Roblox, obj may appear in messages where a player has used a character - for example, an emoji - that your computer doesn't support.
OMQ
In Roblox, OMQ is another way to say "OMG", which means "Oh My God". Usually it is added to usernames for effect, rather than to express shock (as the phrase OMG would).
Oof
The phrase "oof" is derived from the Roblox "oof" sound effect that is played when a character dies. It is used to express surprise, disappointment and joking sympathy.
OP
In Roblox, OP is an acronym for the phrase "overpowered". Overpowered is used to refer to items, players, or other objects that are very powerful or impressive. It may also be used as another way to say "good" or "impressive".