To fall out Meaning, Definition & Usage

Definitions
  1. . (a) To quarrel; to begin to contend.
    A soul exasperated in ills falls outWith everything, its friend, itself.Addison.
    (b) To happen; to befall; to chance. "There fell out a bloody quarrel betwixt the frogs and the mice." L'Estrange. (c) (Mil.) To leave the ranks, as a soldier.

Webster 1913