Also, is it fly by or fly bye?
By is an adverb and a preposition. As an adverb, by means past, as a bullet might fly past someone's head.
Additionally, how do you say time flies? Time flies when you're having fun, or I guess it's ten years since I last saw you-how time flies. This idiom was first recorded about 1800 but Shakespeare used a similar phrase, "the swiftest hours, as they flew," as did Alexander Pope, "swift fly the years."
Also, what does catch you on the fly mean?
informal. If you do something on the fly, you do it quickly, often while you are doing something else, without preparing and without thinking too much about how it should be done: This new rule seems to have been created on the fly.
What does your fly is down mean?
It means their zipper is undone on their pants. It's a very common phrase.
