fall off

verb4

1. •
   To become detached or to drop from.

   • A button fell off my coat.
2. •
   To diminish in size, value, etc.; to get worse (in quality).

   • Business always falls off in the winter.
   • MC ___'s new album is wack - he's fallen off big-time.
3. •
   To change the direction of a sail so as to point in a direction that is more down wind; to bring the bow leeward.

   • She would not mind her helm, but would fall off; she would settle down aft and take in water over her stern, and plunged heavily forward. — 1854
4. •
   To fall into sin; to stray.

   • I am bound to say that no one has fallen off so frequently as myself. I have renounced the devil and all his works; but it is by word of mouth only—by word of mouth only. — 1861