crip, v. — Green’s Dictionary of Slang

crip v.

[the Crips gang, founded in 1969, was orig. called the Cribs, but Crip allegedly arose from a piece in the LA Sentinel, which reported on the use of canes by gang members, as if they had been crippled; it may alternatively have been a simple typo]

(US black) to engage in gang activity, usu. but not necessarily as a member of the Crips; often as cripping n.

1985		T.R. Houser Central Sl. 17: crippin’ To dress in gang attire and go out gang banging, or looking for other kinds of trouble.
1995		L. Stavsky et al. A2Z.

In phrases

Crip out (v.)

(US gang) to identify oneself as a member of the Crips, e.g. by wearing blue clothes.

2001

(con. 1990s) in J. Miller One of the Guys 136: ‘Any dude come over there [...] know that’s a Blood hood, you try to come over there Cripped out, you know you eventually have it some way’.