(v.) To force jello through your teeth onto your chin. Most commonly used as an expression of sexual attraction and as a form of foreplay.
Comes from the fact that jello is simply a sexy food. Also reminiscent of bodily fluids exchanged during sexual intercourse.
"Mary, I find you irresistible! Let's jello!"
"Man, those two are all over each other! They were even jelloing in Starbucks the other day!"
"Yeah, and then we jelloed! You can bet it was the best sex we ever had!"