"Hang Out", They teach that in school?

Last night while I watched TV, my eldest, Damia, said to me, "Mommy, tonight you HANG OUT with me first yeah", I was like, what? What does she means by hang out. Turns out that she wants me to sit with her before she sleep. Wow, Hang Out, Man. That is a cool word. maybe too cool to be used by 6 years old. Sigh...modern world!

Lets Hang Out, Dude..

Note: what other cool word that your kid use?
p/s: I cant quite capitulate the idea that my daughter has cooler vocabs than me.