CBT is another way to say "Azure Temple", one of the challenge stages in Sonic Robo Blast 2 (SRB2).
Whenever there's a new gamemode, expect CBT, also known as: Azure Temple.
CBT is a fantastic Catholic Institute under the name Christianity Believes TheLord and most definitely does not mean cock and ball torture
Catholic 1: Father, I love CBT!
Catholic 2: Now, my son, CBT is best enjoyed only on weekends
CBT or cock and ball torture is a bdsm act
FiniusHey Firb, I know what we are going to do today
Firb: No, nothing but CBT
Friend: bruh did you kno dat rochelle got into a fight today
Friend2: dat CBT she knows how to fight
They finished up CBT with only a few people and are about to open it up to a wider audience with anyone for the open beta test in a few weeks.
Often confused for Cock & Ball Torture, it actually means Closed Beta Testing.
Michael: "Dude did you see the newest Minecraft CBT already?"
Janice: "I could do some CBT with you~"
Michael: "Oh sweet! Let me add you on discord so we can play it together."
Janice: "Oh... sure..."