IDIOM ►

throw good money after bad

Meaning 1
to continue to gamble after losing
Sentence 1
You are going to throw good money after bad if you continue to play the lottery.
Meaning 2
to continue to waste money , to continue to do something when it hasn't worked
Sentence 2
Why don't you buy a new car? You are throwing good money after bad when you spend money for repairs for that old car.