double cracks – twice as much ammunition as usual

(Pronounced kraks)

The word double cracks is found in act 1, scene 2, line 37 of Macbeth Shakespeare.

"As cannons over-charg'd with double cracks."

To remember the definition of the word double cracks, use the following mnemonic:

There was a sound of a double crack from one cannon, they must have used twice as much ammunition as usual.