grab on and growl

A beastlier way of saying "dig in!" or "enjoy!"

Jon: Hey, Dave's back with the burgers!
Dave: Here ya go, grab on and growl!

grab it and growl

An invitation to seize an opportunity with vigor.

Hey man, I'm not sure if I should pursue computer programming.
Bro, grab it and growl, grab it and growl.

grab and growl

When there isn't anything planned for dinner so everyone eats whatever they want for dinner. "Grab" what you want to eat and "Growl"/fight over it if there is a limited number of something and two people want it.

What's the plan for dinner tonight?
Grab and growl