Steven Universe - Wrong story, Greg ;_;

Rose: I like your van

Garnet: Woo!

… Good night everybody!

Ok the "Goodnight everybody" thing is being used to signify the dialog as an innuendo. I got it from Animaniacs. What I'm implying is that Rose likes his van, because they boned in it.
So Rose says she likes his van, Garnet "woos" it… Good night everybody!
Kinda half-assed it, but I hope that explanation kinda helps