pack a box
A pack a box is a disabled person who can pop their joints out like a broken toy from IKEA, and it’s both funny and annoying.
"He’s a total pack a box, and his knees pop like a broken box.", A friend describing his cousin.
"She packed her box so much, her jaw popped out.", A girl describing her mom.
"That guy is a pack a box, and his hips pop like they’re on fire.", A guy at the gym.