go stale

If all I did was pretend I was Wilderness Jimmy I would go stale.

The intentions of such persons are nearly always good, because they change them before they have a chance to go stale.

He means he wouldn't read anything but his medical journals and he'd 'go stale.'

I trust you to see to it that they do not overdo nor ‘go stale’ before the date set for the match.

I had "gone stale," that is the technical name for my disease, and to "go stale" is no joke.

Its quite a while to the games though, and any one of them may go stale.