You get a mouthful of jellybabies of any kind (the cheaper the better) and you spit them all inside someone's vagina. You have sex with the girl and cum inside them. After the girl squeezes all the jellybabies into a jar, juices and all and you can both share or wolf it down yourself!
"Oi girl! I'm gonna give you a West Kent Jellybaby you ain't never gonna forget!"