1
general::
Phrase(s): fall off (of) something)
to drop off something. (Of is usually retained before pronouns.) • A button fell off my shirt. • I fell off the log. • The twigs fell off of him as he stood up., Phrase(s): fall off
to decline or diminish. • Business falls off during the summer months. • My interest in school fell off when I became twenty.
McGrawhill's American Idioms And Phrasal Verbs