A fork of Rural Dictionary
when boys and girls convince their parents that they are "just friends" and feel like "brothers and sisters" so they can sleep in one's basement and make out with each other and get drunk.
guy 1: lets have a co-ed sleepover
girl 1: you're such a perv!
guy 2: come on you know that we all are just friends
girl 2: oh already practicing for what you are gonna tell your parents
It is a sleepover where there are both boys and girls also known as a orgy
that was one crazy co-ed sleepover,we kinda missed with our weenie juices and got them on the coutch. At least we wont get any girls pregnant.