What is Go In?
1.
to
Next time you wear some sh*t like that, I gotta go in on you!
Jerome went in DEEP on Quincy at the lunch tables, had everyone
dyin' but had him cryin' afterbaggin' on his dead pops.
Martin Lawrence used to go in on the audience on Def Comedy Jam
See
2.
Primarily used in freestyling--the audience or fellow rappers tell the MC to go in...on the beat or into the cipher.
Also used in other appropriate settings where participation or action is necessary.
(instrumental playing)
"John--kill this beat! go in!"
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Jared: "That girl looks so fine over there. I want to talk to her."
Andy: Well, go in!
See
3.
(v) In skydiving, to fail to open the parachute, to fall to one's death.
Oh, my God, Joe's going in!