Green’s Dictionary of Slang

1. the penis.

1987		Ice T ‘Pain’ 🎵 Girlies on my jammie, got a female overload.
1993		Ice Cube ‘It Was a Good Day’ 🎵 Pulled out the jammy, and killed the punanny / And my dick runs deep so deep so deep.
1999		Hip-Hop Connection Dec. 45: Jammy: Jammy can mean dick as in the Beasties’ line, ‘All the fly girls are on my jammy’.
2012		C. Eble (ed.) UNC-CH Campus Sl. 2011 6: JAMMIE — genital area: ‘At the soccer game yesterday I got kicked right in the jammie.’.

2. (also jammie) a handgun, a pistol.

1986		Beastie Boys ‘Rhymin’ and Stealin’ 🎵 I’ll pull out the jammy and squeeze off six.
1995		S. Moore In The Cut 63: There seem to be more synonyms for guns than vaginas on this list. [...] jammie, gun.
1999		Hip-Hop Connection Dec. 45: Jakes: Po-Po, One-Time, 5-0, the fuzz, etc. A jammy is also a gun.
2000		Ebonics Primer at www.dolemite.com 🌐 jammie Definition: a handgun, usually wielded by a ‘G’ Example: Yo git this! When that pig come to take Tyrone to the zoo, yo he pulled his jammie and busta cap in that po-po’s azz.
2011		DJ Quik ‘Fire & Brimstone’ 🎵 Put me in a jam till I come back with the jammy.