mom: (looking at the computer) What's "a grip of coffee"?
me: What? What are you looking at?
mom: Someone wrote here "I bought a grip of coffee".
me: It just means a lot of coffee. It's just slang for "a lot".
mom: How would you use it in a sentence?
me: Umm...you made a grip of soup?
mom: I used a grip of barley.