run out on (someone or something)

run out on (someone or something)

To abandon someone or something that one is committed to or responsible for, especially very suddenly or abruptly. I can't believe you would even consider running out on your family when they need you the most! The jerk at table four ran out on his bill, leaving us in the lurch for nearly $250.
See also: on, out, run
Farlex Dictionary of Idioms.

run out on

Desert, abandon, as in He's run out on the family. [First half of 1900s]
See also: on, out, run
The American Heritage® Dictionary of Idioms by Christine Ammer.
See also:
  • pull the rug
  • pull the rug (out) from under (someone)
  • pull the rug (out) from under (someone's) feet
  • pull the rug from under
  • pull the rug from under someone/something
  • pull the rug out
  • pull the rug out from under
  • abortive action
  • change one's tune, to
  • sing a different song/tune