DISHWATER

dish ‧ wa ‧ ter /ˈdɪʃˌwɔːtə $ -ˌwɒːtər, -ˌwɑː-/ BrE AmE 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