be as dull as dishwater

be as dull as dishwater

To be very boring or unexciting. This phrase is often used to describe a person. My date with Dave was not great—he is as dull as dishwater. I fell asleep during that movie because it was as dull as dishwater.
See also: dishwater, dull
References in periodicals archive ?
Get real, Martina, women's tennis needs a bit of glamour or it would be as dull as dishwater.
And while the mighty Reds of 2001 can be as dull as dishwater. You have to feel for those forced to commentate on Liverpool.