There's many a slip twixt cup and lip

There's many a slip twixt cup and lip.

  (literary)
something that you say in order to warn someone not to be too confident about the result of a plan, because many things can go wrong before it is completed We still might finish in time for the deadline, but there's many a slip twixt cup and lip.
See fall through the cracks, let slip
See also: and, cup, lip, many, slip, twixt
References in periodicals archive ?
There's many a slip twixt cup and lip just as there are plenty of obstacles between now and Cheltenham in March, but the classy Flat-raced five-year-old Mijhaar looked a genuine supreme Novices' hurdle prospect with an easy debut win in the 2m1/2f novice hurdle here.
Let's remain upbeat and remember the old proverb - there's many a slip twixt cup and lip.
Full browser ?