ball up

To crush or form into a ball shape.

To form melted metals into balls or lumps to roll them out of a furnace for further use.

To coil up into a ball.

To become ball-shaped.

To hunch over and pull in one's arms and legs.

(slang) To ruin or botch.

To play basketball, especially playing well.

(slang) To smoke marijuana.

(slang, old-fashioned) To become confused or discombobulated; to confuse (someone).

To become covered in damp snow.

To produce a lip of debris around the drill hole.

(slang) To switch to using a stronger bowling ball.

The method by which the field umpire restarts play at a neutral contest after a stoppage within the field of play, involving the throwing or bouncing of the ball up between two players, known as rucks, who then attempt to win possession for their teams.