If you do somethingat the drop of a hat, you do it quickly and immediately, without hesitation. ... They're ready to help out at the drop of a hat."

What is an idiom for fast?

1. as quick as a flash, as quick as lightning. Someone who is as quick as a flash (or as quick as lightning) is simply very fast. As soon as a seat on the bus became free, he sat down in it – as quick as a flash.

What is another word for doing something quickly?

In this page you can discover 93 synonyms, antonyms, idiomatic expressions, and related words for quickly, like: speedily, flashing, swiftly, hurrying, hastily, hurriedly, shooting, rapidly, rushing, without delay and briskly.