blood in
Advanced (C1)slang
To officially let someone join a gang by making them do something violent first.
"They blooded him in by having him fight three senior members at once."
Hear it in context

JRE MMA Show #177 - Protect Ya Neck
PowerfulJRE · 160:18
Blood in Blood Out.

JRE MMA Show #177 - Protect Ya Neck
PowerfulJRE · 160:19
Blood in Blood Out.

#UFCVegas116 Watch Along w/ UFC Hall of Famer Jens Pulver
UFC FIGHT PASS · 290:37
Blood in his body.

Cycling to Makino Station! ft. Abroad in Japan & PremierTwo | Cyclethon 5 Day 13
CDawgVODs · 46:48
__] no blood in the back.

Doctor Reacts To The Pitt S2 Ep10 w/ Supriya Ganesh
Doctor Mike · 42:24
Lots of blood in the airway.