1
general::
Phrase(s): fall by the wayside
Go to drop by the wayside.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Fail to continue, drop out, as in At first she did well on the tour, but with all the pressure she soon fell by the wayside. This phrase appeared in William Tyndale's translation of the New Testament (1526; Luke 8:5).
American Heritage Idioms