Green’s Dictionary of Slang

jit v.

(US) to ejaculate.

‘Shell’s Degredation’ on asstr.org 31 Jan. [Internet] We can jit anywhere we want in her fuckin' ass or wherever. But, and this is a big but, she says she WANTS US TO CUM IN HER FUCKING MOUTH!!!!
‘A Life Converted’ on asstr.org 25 Apr. [Internet] With the fury of an ejaculation he had never in his life felt, he convulsed and writhed as he jitted his boy cream into Rex's statue.