1. in a flash - Adverb
2. in a flash - Phrase
without any delay
Source: WordNetI mean, if somebody said to me, junior year of college, you can go anywhere, your old man's paying for it, I'd have been gone in a flash. But I had to work. Every summer my mother would say, 'Get that job and hold on to it until August 30.' Chris Matthews
Ideas do not always come in a flash but by diligent trial-and-error experiments that take time and thought. Charles K. Kao
And in a flash I understood the meaning of sex. It is a craving for the mingling of consciousness, whose symbol is the mingling of bodies. Every time a man and a woman slake their thirst in the strange waters of the other's identity, they glimpse the immensity of their freedom. Colin Wilson
By the time May rolls around, I'm probably going to want to spend a month on an island. But if Steven Spielberg or Steven Soderbergh or any number of directors were to say 'Hey, there's this role, are you interested?' I'd be there in a flash. Marg Helgenberger
There's no way to release yourself from a memory. It ends when it wants to end, whether it's in a flash or long after you've begged it to stop. David Levithan
The healing power of even the most microscopic exchange with someone who knows in a flash precisely what you're talking about because she experienced that thing too cannot be overestimated. Cheryl Strayed