The letters “ABC” don’t actually stand for anything in Roblox. It’s not an acronym.
It’s just a phrase to let other players know they’re up for a job or task or trade.
For example, if a player said in Roblox chat:
Player 1: “abc if you have angel eyes”
Player 2 would respond: “abc”
If player 2 responded with abc like that, and lets everyone know he or she had angel eyes and wanted to offer something to trade, that makes it easy for players to figure out in Roblox chat and know who is willing to trade.
ABC & Adopt Me
“ABC if…” is a popular thing in big Roblox roleplaying games like Adopt Me where users ask for trades.
Other ABC Example
Player 1: “abc for a brother”
Player 2: “abc”
In that example, player 2 let player 1 know he or she wants to be player 1’s brother.
It is similar to asking someone to raise their hand within the game in the chat feature.
So, if you are worried that ABC in Roblox means something weird or bad, its not bad at all. It’s just a common and easy way for players and kids to communicate trades and offers within the Roblox game they are playing.