Sentence examples for slip by from inspiring English sources

The phrase "slip by" is correct and can be used in written English.
It means to pass by quickly or unnoticed. Here is an example: - The days slip by so fast, I can't believe it's already the end of the month. - Time seemed to slip by as we were having such a good time at the party. - The opportunity to travel abroad slipped by when I couldn't get time off work. - I didn't even realize that my birthday had slipped by until a week had already gone by.