In no time flat phrase
Very quickly; in a short period of time
The incident happened in no time flat.
He is such a genius. He can solve this complicated equation in no time flat.
Very quickly
Very fast.
Quickly and effortlessly
The origin of this phrase is not clear.
Used to indicate that helping each other or working together toward the same goal will have advantages for everyone who is involved
The relationship between fashion and film is that one hand washes the other and both wash the face.