fall back upon (someone or something)(redirected from fallen back upon us)
fall back upon (someone or something)
To depend on someone or something that one has kept in reserve. If you keep buying those expensive gadgets, you won't have any money to fall back upon in case of an emergency. I don't want to keep falling back upon my parents whenever I get into trouble.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.