trite, hackneyed, stereotyped, tired, worn out. Kind of like a tv program one's children have watched...and watched...and watched some more.

In other words, find another way to say it. If you think your phase is unique, try a search for it at Clichés, Sayings, Phrases & Figures of Speech to find out for sure. It's a fun resource.

A few examples:

Another useful cliché site is Cliché Finder. Bare bones, but easy to use site.