Many hands make light work

When multiple bros work together to accomplish something.

Bro 1: Did you see that YouTube video “we all lift together?”
Bro 2: No what is it?
Bro 1: 5 guys hammer a nail in rhythm.
Bro 2: Many hands make light work.

Me personally

Usually the start of banter or diss when someone else was already dissed beforehand to put them down further.

Denzel - Yo Demetrius, you dumb asf.

Dion - Me personally, I wouldn’t let that slide.