Definitions by socasual.

erra 

The noise beatboxers use when imitating the sound of the discs being scratched on turntables. Can also be used in the same way as such words tru and legit; as an agreeable statement, or instead of sup or what it is; as a greeting.

G#1: "aight man, lay down the beat."
G#2: "(beatbox sounds) erra! (beatbox sounds)"

girl1: "ah man, last night was so liveee!"
girl2: "erra!"

cool kid: "eyyyy what it is man!"
cooler kid: "erra"

erra by socasual. March 23, 2010