A overused saying that teenage boys are obsessed with. It's basically the teenage boy version of, "Take a chill pill." Its pretty lame, and when you say it, you sound like a tool.
Chuck: "Yoo dude, did you tap that yet?!?"
Tom: "Yo chill, it's not even like that."
Chuck: "Yo dawg, yes it is, so chill with the yo chill."
Tom: "Yo chill with that, I'm working on it."
1.) *Like, omg... I met this guy, and he was so fine, and I got my nails done.. omg... *Bi-ach! Chill Yo Grill! Nobody wants to hear that shit!
2.) *Dang foo, yo mama, yo mama! *Man, You need to Chill Yo Grill, before I mess it up!
3.) *Ahhhhhhhhh! I don't know what to do... AHhhh..! *Look, Chill Yo Grill, before I make you chill it!
ETC.