1
general::
Phrase(s): (My,) how time flies.
1. Time has gone by quickly, it is time for me to go. • Bill: Look at the clock! Mary: How time flies! I guess you’ll be going. Bill: Yes, I have to get up early. • John: My watch says it’s nearly midnight. How time flies! Jane: Yes, it’s late. We really must go. 2. Time passes quickly. (Said especially when talking about how children grow and develop.) • "Look at how big Billy is getting," said Uncle Michael. "My, how time flies." • Tom: It seems it was just yesterday that I graduated from high school. Now I’m a grandfather. Mary: My, how time flies.
McGrawhill's American Idioms And Phrasal Verbs