pay the piper
To suffer the results of being foolish; pay or suffer because of your foolish acts or wasting money.
Bob had spent all his money and got into debt, so now he must pay the piper.
Fred had a fight, broke a window, and quarreled with his counselor so now he must pay the fiddler.
Compare: FACE THE MUSIC (2).
(From the proverb "He who dances must pay the piper (or the fiddler).")