ballˈhawk noun

( N Am inf)A sportsman who has a talent for gaining possession of the ball

ball lightning noun

A slowly moving luminous ball occasionally seen during a thunderstorm

ball mill noun (engineering)

A horizontal cylindrical container in which a substance is ground by rotation with steel or ceramic balls

ball park noun (chiefly US)

1. A baseball field
2. A sphere of activity
3. The area designated for the landing of a spacecraft (in the right ball park (informal and figurative) more or less correct)

ballˈpark adjective (orig US)

Approximate, esp in the phrase ballpark figures

ballˈpeen hammer noun

A hammer with a rounded peen, used esp for beating metal

ballˈ-player noun

1. A player (esp of football) with outstanding ball-control skills
2. A baseball player (N American)

ballˈpoint or ballpoint pen noun

A fountain pen with a tiny ball rotating against an inking cartridge as its writing tip

ballˈ-proof adjective

Proof against balls discharged from firearms

ballsˈ-aching adjective (slang)

Tedious

ballsed-up, balls-up see balls up below.

balls-outˈ adjective (slang)

Performed in an aggressive and uncompromising manner

ball valve noun

A non-return valve closed by a ball forced into an aperture

ball and chain

1. A means of hobbling a prisoner consisting of an iron ball chained to an ankle
2. A severe encumbrance
3. One's wife (slang)

ball-and-socket joint (physiology and engineering)

A joint formed of a ball partly enclosed in a cup-shaped cavity, allowing rotation on various axes

ball of fire

1. A lively, dynamic person
2. A glass of brandy (informal)

balls up (vulgar sl)

1. To make a muddle or mess of
2. To throw into confusion (ballsˈ-up noun; ballsedˈ-up adjective)

ball up

1. To clog
2. To make a mess of (slang; ballˈup noun (US); balledˈ-up adjective)

have someone by the balls (vulgar sl)

To have someone at one's mercy or in a helpless state

keep the ball rolling

To keep things going

make a balls or balls-up of (vulgar sl)

To do badly, make a thorough mess of

on the ball (informal)

1. Properly in touch with the situation
2. On the alert

play ball (informal)

To co-operate

set, start or get the ball rolling

1. To make the first move
2. To start things going

the ball at one's feet

1. Success within one's grasp
2. An opportunity ready to be taken

the ball's in your court

The responsibility for the next move is yours

the whole ball of wax (N American slang)

The whole lot

three balls

The sign of a pawnbroker