Slang- Part 5

This one had me dumbfounded. Usually I can figure out the gest of what a person was saying but I had absolutely no clue what my friends were saying.

A grip: adjective- a large amount. Most commonly used when referring to a large amount of individual objects. For example: We had a grip of papers due. Less often referring to a large amount of a collective object. For example: There was a grip of rain last night.

I even challenged a friend about his usage of this slang word. Duh, that was dumb to say the least. Who's the native speaker? Not me, that's for sure.