Idiom: 'Flat out'

What does 'Flat out' mean?

Meaning: If you work flat out, you work as hard and fast as you possibly can.

All idioms have been editorially reviewed, and submitted idioms may have been edited for correctness and completeness.

If you have a question about idioms, ask us about it in our Idioms Discussion Forum.

If you know of an idiom that you would like to be listed here, please use our online form to suggest an idiom.

See also: