Throw Good Money After Bad

Throw good money after bad

to waste additional money after already wasting money on the same thing.
ខ្ជះខ្ជាយលុយបន្ថែមទៀតទៅលើរឿងដ៏ដែល ដែលយើងបានខ្ជះខ្ជាយលុយរូចម្តងហើយ។
Example:
- I don't want to throw good money after bad, so I will not pay any more money to fix my car.
- ខ្ញុំមិនចង់ខ្ជះខ្ជាយលុយបន្ថែមទៀតទេ ដូច្នេះខ្ញុំនឹងមិនបង់លុយដើម្បីជួសជុលឡានរបស់ខ្ញុំទេ។