Definitions by HomogeneousNigga91

Jack S. 

Some short-tempered anorexic kid with a micropenis.

Guy 1: You see that dude over there

Guy 2: Yeah

Guy 1: Bro he looks like he might be throwing a hissy-fit over some dumb shit.

Guy 2: He's probably a Jack S.

Jack S. by HomogeneousNigga91 June 11, 2019