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.