Definition of "swammy"

I just sold a swammy with ten homis on it

2013 May 13, French Montana featured by A$AP Ferg (lyrics and music), “Work REMIX”, in Trap Lord‎

C4 run man through the alleyGet a man down with the swammyGet a man down with the whammyBoot couple niggas on the roadNo face no case with the bally (booting)

2015 November 1, “Dem Man Know”, C4 (814) (lyrics)

We some bastards no daddies, swammies start blasting

2017 January 15, “Kennington Where It Started”, MizOrMac (Harlem Spartans) (lyrics)

Do road with my shank on meOr do I keep my strap out off at neighboursNo space for the swam […]

2017 July 17, OFB (RV, Kash, Lowkey, Headie One, Bradz & Tuggzy) (lyrics and music), “Loyal”‎, 0:21–0:25