fly the coop
Fig. to escape; to get out or get away. (Alludes to a chicken escaping from a chicken coop.) I couldn't stand the party, so I flew the coop. The prisoner flew the coop at the first opportunity.
Please keep your fingers crossed that it's not a dud... we shall know on Wednesday... if the guy doesn't get another offer before then...
Keep your fingers crossed for us, would ya?