a drink that is thin and weak.
foolish talk or writing; claptrap.
Origin of wish-wash
First recorded in 1780–90; extracted from wishy-washy
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for wish-wash
Historical Examples of wish-wash
And then, when ruin seemed to have come completely upon the expedition, wish-wash!Off to the Wilds
George Manville Fenn
any thin weak drink
rubbishy talk or writing
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012