The breast's of a black chick, mostly large Black chicks, as in 'Oprah Winfrey!
Josh: "WOW, have you seen the rack on Oprah Winfrey!"
Vinny: "Yeah, she got huge jigaboobs!"
Vinny: "Hey, I banged this chick last night, she had the biggest jigaboobs i've ever seen!"
Josh: "Ain't no boobs like Jigaboobs!