great balls of fire

a great deal

Very much; to a great extent; a lot; lots.

add fuel to the fire

To worsen a conflict between people; to inflame an already tense situation.

ball of fire

A person who is especially active, ambitious, hard-working, or high-achieving.

balls of steel

Courage, audacity.

balls to the wall

With maximum effort or commitment.

bust one's balls

To work very hard; to put in a lot of effort.

catch fire

To become engulfed in flames, to combust.

Cobblers

[Cockney slang]balls or 'bollocks'

via cobblers' awls