dish‧wa‧ter /ˈdɪʃˌwɔːtə $ -ˌwɒːtər, -ˌwɑː-/ noun [uncountable]

1. dirty water that dishes have been washed in

2. informal if you say that tea or coffee tastes like dishwater, you mean that it tastes unpleasantly weak

[TahlilGaran] Dictionary of Contemporary English ▲