1) to say explicitly
2) to imply with body language 3) a term used to paraphraseroughly what a speaker said
1) I met Sarah yesterday at a party and she was all like "Why didn't you tell me you were coming?"
2) After watching the show he was totally all like "What the hell?"
3) After hearing Republicans talk, Democrats have a tendency to be all like "Huh!?"
BILLY: Hey Susie, wanna go hit that nudie beach up in Malibu and get rid of some of these tan lines?
SUSIE: Are you kidding? Have you looked outside today? It's raining ike crazy out there!
BILLY LOOKS OUT THE WINDOW.
BILLY: Damn. It's raining like all balls.
To make an act one's top priority, much like scarfing free breakfast would be for a donkey, were it confronted by an unattended waffle. Usage of the phrase implies some amount of immediacy or urgency to the performance of the act.