Green’s Dictionary of Slang

1. (US prison) to fight, usu. with fists [jackpot n. (1)].

1992

Bentley & Corbett Prison Sl. 91: Scuff Up To fight. The term is primarily used in reference to a fist fight. (Archaic: jackpot).

2. (US Und.) to chat, to gossip, to reminisce [abbr. of gambling cut up jackpots, to reminisce over card-games].

1975

Urban Life IV 203: For the elderly street hustlers, fantasy takes the form of reminiscing over past exploits and accomplishments (participants refer to this practice as ‘jackpotting’).