Drop the ball and Gum up

Drop the ball verb - Commit a faux pas or a fault or make a serious mistake.

Gum up and drop the ball are semantically related. in blunder topic. In some cases you can use "Gum up" instead a verb phrase "Drop the ball", when it comes to topics like make mistake.

Gum up verb - To prevent passage through by filling with something.

Drop the ball and gum up are semantically related. Sometimes you can use "Drop the ball" instead a verb "Gum up".