Longman Dictionary of Contemporary English
Wiktionary
n. (alternate form of falling out English)
Wikipedia
Falling-out is a culture-bound syndrome primarily reported in the southern United States and the Caribbean. It is described as a constricted consciousness as a psychological response to anxiety and specific stressors. Sudden collapse characterizes episodes of falling-out, whether without warning or preceded by dizziness and a spinning sensation. The individual suffering from symptoms of falling out can usually hear and understand what is going on around them.
Falling-out is not treated as an illness unless it becomes disabling. It is often seen as a normal response to stressful situations, funerals, or when a person receives shocking information.
Usage examples of "falling-out".
He had been hosted by relatives ignorant of his falling-out with his father, people who had reacquainted him over a visit with what he had forgotten about his home-life: the companionship of brothers and sisters, the warmth of a night spent before the fire, conversation with his mother, and even the arguments with his father.
Perhaps the man had had a falling-out with Ashford and had set off on his own when his trail crossed Dal's.
He thought they'd had a falling-out with each other because of the investigation, and that maybe Pike was worried that Wozniak was going to give him up to cut a deal.