Green’s Dictionary of Slang

political adj.

[the racial politics that underpin US prison gangs]

(US Und.) concerning prison gang life and activities.

[US]Bentley & Corbett Prison Sl. 43: Political Gang membership in prison [...] is not simply being a member of a particular gang, it is a way of life [...] This way of thinking and living is referred to as political.

In compounds

political tats (n.) [tat n.3 ]

(US Und.) specialized tattoos that refer to one’s membership of a gang.

[US]Bentley & Corbett Prison Sl. 43: Political Tats Tattoos that represent gang insignia or membership.