Sex but with a hashtag. Plural #sexi . Refer to sex

Something I will probably never have.

Yeah that's right, it's the one thing urban dictionary doesn't have.

Sex is the acronym for the way humans are created. S stands for Super, E stands for extraterrestrial, and X stands for Xenomorphing. So sex is Super Extraterrestrial Xenomorphing. The way it works is the storks deliver the baby to the mom. The baby is created by crushing high energy mass, and the rest ends up in the mom's belly. The mom goes to the hospital so they make sure that she doesn't drop the baby. And she also had to scream really loudly for the storks to know where she is.

What you won't be getting tonight.

what all of Urban Dictionary's definitions are about

According to Mean Girls, it is a very dangerous thing to do.