Talk:Epic Rap Battles of History 58/@comment-108.210.86.239-20150829183635/@comment-24152309-20150829190036

"in before" it's used when someone predicts something is going to happen before it happens for comedic effect.

User1: man, user3 totally sucks

User2: inb4 user3 shows up

~user3 has just stepped right in~

User3: heard you were talkin shit