The action of swallowing a mouth full of cum from several individuals contributing their own unique flavor to the mix at one time.
Her/His mouth began to fill with cum, as each man ejaculated in succesion until about to overflow with creamy goodness, the tasty neopolitan of unique flavor was swallowed in one gulp.
It's a variant of the new york taco. Instead of barfing in a woman's pussy, you take a shit in it - and do so while she's on her period. Then you fuck her and shoot your load all over the shit and menstrual drippings, thus creating "the neopolitan".
It was that specialtime of the month for her, but rather than let her turn me down for sex, I opted to shit and cum on her bloody vag for an extra tasty neopolitan treat.
When you fuck a girl on her period (strawberry), then fuck her ass(chocolate), then jizz in her mouth(vanilla). Then she has chocolate strawberry and vanilla all in her mouth.
The act of chugging a gallon of whole milk, then engaging in anal intercourse with a black person. After a while you should vomit the milk into the person's rectum, creating a white, black, and pink combination. It greatly resembles the NeoPolitan sundae.