Green’s Dictionary of Slang

(US campus) ejaculated semen.

1989		P. Munro Sl. U. 179: splooge [...] semen.
2001		J. Stahl Plainclothes Naked (2002) 244: Zank rubbed the sploodge off his leg with the back of his gun hand.
2013		K. Shea ‘Having Chiqui’ in ThugLit July-Aug. [ebook] Chiqui just took a tissue, dabbed off Muzz’s greasy splooge of jizz.