Lost Cause Meaning
(idiomatic) A cause, attempt, or effort that is hopeless or futile.
Example: He has already made up his mind, and it's a lost cause to try to change it.
2015, Paul Wilson, Alexis SÃ¡nchez sends Arsenal into final after gallant Reading go the distance (in The Guardian, 18 April 2015)
Artfully pulling the ball back to leave McCleary chasing a lost cause, SÃ¡nchez calmly made space for a shot and applied a finish that beat the despairing dives of both Federici and Michael Hector, the latter vainly attempting to recover position when it was too late.