fall behind on (something)(redirected from fell behind on)
fall behind on (something)
1. To not be up to date on one's current financial obligations. All of those medical bills have caused me to fall behind on the rent.
2. To not be as current with task or activity as one should or ideally would be. I fell behind on my schoolwork when I had the flu.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.