flat out

Meanings

1. Used other than figuratively or idiomatically: see flat, out.
2. Complete, total, downright.
3. Very busy.
4. Lazy, sleeping.

1. At top speed.
2. Without hesitation or reservation, bluntly, no holds barred, totally, outright.

1. A total failure.
2. A baked portion of flatbread; a baked item that is not meant to rise.
3. A wrap, an item of food consisting of various ingredients wrapped in a tortilla or pancake.
4. A section of piste that is relatively flat, causing or allowing skiers to slow down.
5. An uncambered corner of racetrack; a racetrack whose corners are uncambered.

1. To fail after a promising beginning; to disappoint expectations.
2. Synonym of flatten out (to make flat)