dishwater
noun [ U ] uk/ˈdɪʃˌwɔː.tər/ us/ˈdɪʃˌwɑː.t̬ɚ/
洗碗水
water in which dirty plates, cups, forks, etc. have been washed
Idiom
like dishwateridiom informal disapproving （指饮料等淡而无味）像洗碗水一样
used to describe a drink or liquid that is unpleasant because it contains too much water and has very little flavour
This soup/tea tastes like dishwater. 这汤／茶像洗碗水一样淡而无味。