If you don’t know what a “cook session” is, or are unfamiliar with chattoulette, you might want to bookmark the Common Sense Education Digital Glossary so you can quickly look up the kinds of terms teens use in their digital shorthand these days. So you know, a “cook session” is when one or more kids gang up against another kid on social media, and chatroulette is an online service that allows users to video chat and exchange messages with random users.