fall behind


verb (intr, adverb)

to drop back; fail to keep up
to be in arrears, as with a payment
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Idioms and Phrases with fall behind

fall behind

Also, get behind.

1

Lag, fail to keep up, as in You really must keep up with the others; if you fall behind you could get lost. [First half of 1500s]

2

Be financially in arrears, as in He fell behind in his payments. [Mid-1800s]

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.