The idiom "quick as a flash" means to do something very quickly or instantly. It is used to describe someone or something that moves or acts with great speed or without any delay.
For example, if you are playing a game of catch with a friend and they throw the ball to you and you catch it immediately, your friend might say, "Wow, you caught that ball quick as a flash!"
Another example could be if you are in a race and you finish first, someone might say, "You ran that race quick as a flash!"
Overall, the idiom "quick as a flash" is used to describe something that happens very quickly or without any delay.
• The skilled athlete moved across the court quick as a flash, impressing the audience with her agility.
• She finished her exam quick as a flash, leaving everyone else still writing.
• As soon as the fire alarm went off, the employees evacuated the building quick as a flash.
• The thief disappeared quick as a flash, leaving no trace behind.
• Quick as a flash, I ran to catch the bus before it left.
• When the teacher asked a question, Maria's hand shot up quick as a flash.