If you're saying what's lingo..then this is for you!  Your child's life can be very apparent just through simple things that parents don't understand: like word choice, etc.  What is your teen really mean when he says stuff to you?

Learning the language involves interpreting both what your teen is saying to you with words, as well as what their body language is telling you. Often the two do not match, which makes it difficult for parents to understand what their teens are really saying."

(

via How to Learn Teenage as a Second Language on Shine.)