1
general::
1. Depart in haste, run away, as in The cat took one look at Richard and made off. [c. 1700] 2. make off with. Take something away; also, steal something, as in I can't write it down; Tom made off with my pen, or The burglars made off with the stereo and computer as well as jewelry. [Early 1800s]
American Heritage Idioms
2
general::
Phrase(s): make something off (of) someone or something
to make money from someone or something. (Of is usually retained before pronouns.) • Are you trying to make your fortune off of me? • We think we can make some money off the sale of the house.
McGrawhill's American Idioms And Phrasal Verbs