fight a losing battle
idiomPart ofbattle
fight a losing battle — idiom
1. to keep trying to do something even though you have very little chance of succee
1.idiom
Definition
to keep trying to do something even though you have very little chance of succeeding.
Example
Trying to keep the kitchen clean with three young kids feels like fighting a losing battle.
The small bookshop is fighting a losing battle against the giant online retailers.