from Wiktionary, Creative Commons Attribution/Share-Alike License
- time flies (used as an alternative to this phrase).
- "Meanwhile, the irreplaceable time escapes", expressing concern that one's limited time is being consumed by something which may have little intrinsic substance or importance at that moment.
Borrowed from Latin, from the verse Georgica which was written by the Roman poet Virgil which is sed fugit interea fugit irreparabile tempus ("but it flees meanwhile: irretrievable time flees") which has the less literal translation "while, the irreplaceable time escapes". (Wiktionary)