: when you want to start a performance, especially a rap performance, you say, "gimme a beat gimme a beat" with full enthusiasm.
: a rap intro.
: popularized by SB19's Josh Cullen Santos in their IWant guesting last 2019 which became an important phrase inside the fandom.
Host: Rap? You want to rap? Okay, leggo.
Sejun: Aye.
Justin: C'mon Josh!
Stell: Ready?
Josh: Gimme a beat, gimme a beat!
Ken: *starts beatboxing*