fall out in WordNet English dictionary

1. come to pass
   "What is happening?"; "The meeting took place off without an incidence"; "Nothing occurred that seemed important"
   happen  hap  go on  pass off  occur  pass  fall out  come about  take place 
   
2. come off
   "His hair and teeth fell out"
   come out  fall out 
   
3. have a breach in relations
   "We fell out over a trivial question"
   fall out 
   
4. leave (a barracks) in order to take a place in a military formation, or leave a military formation
   "the soldiers fell out"
   fall out 
   
5. come as a logical consequence; follow logically
   "It follows that your assertion is false"; "the theorem falls out nicely"
   follow  fall out 
   

fall out in English Wiktionary