Short for jizz ability, it refers to the amount, speed, and potentially appearance of the ejaculate.
"Tommy's jizzility is ridiculous, he could get 30 women pregnant in one shot"
"Bill's jizzility is so high that he gave Margaret a black eye during a facial"
"Bill's jizzility is so high that he gave Margaret a black eye during a facial"
by Ryan Hammeredson November 01, 2013