Sam: Dave, Look At Jeff, He's Got An Insane Monkey Grip On That 20 LB Sledgehammer.
Dave: I See That Sam, You Gotta Be Really Strong To Do That
Jesse: How Come Jake Can Monkey Grip And We Can't?
John: I Dunno, But At Least He's Got Really Good Welds
Originating from the story of trapping monkeys. This is done by placing a banana behind a device that a monkey can easily get their hand through. While grabbing the fruit they make a fist that wont allow them to pull out and they wont let go of the banana.
Maybe if you let go of your monkey grip on those groceries you could open the door.
I had a monkey grip on the fork and couldn't catch the dropping plate of food.