not have the stomach

not have the stomach (for something)

also have no stomach (for something)
to not feel strong or brave enough to do something unpleasant The soldiers did not have the stomach for another fight.
Usage notes: sometimes used in the form not have the stomach to do something: I don't think I've got the stomach to argue with her again about money.
Related vocabulary: your heart isn't in it
See also: have, not, stomach