fall off

Short definition from Wiktionary

Verb

1. 1
   To become detached or to drop from.
2. 2
   To diminish in size, value, etc. To get worse (in quality).
3. 3
   To change the direction of the sail so as to point in a direction that is more down wind; to bring the bow leeward.
4. 4
   To fall into sin; stray.

Noun

1. 1
   Alternative form of falloff.
2. 2
   Alternative spelling of falloff.