as dull as dishwater

Related to as dull as dishwater: dull as ditchwater, dull as ditch water

(as) dull as dishwater

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
Farlex Dictionary of Idioms.

(as) dull as dishwater

mod. very dull. Life can be as dull as dishwater.
See also: dishwater, dull
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • (as) dull as dishwater
  • dishwater
  • dull
  • dull as dishwater
  • be as dull as dishwater
  • (as) dull as ditchwater
  • dull as ditchwater
  • ditch
  • ditchwater
  • be like watching grass grow
References in periodicals archive
Eric Clapton Old Sock THE 21st studio album from the guitar legend sees him try his hand at classics such as All Of Me, Born To Lose and Goodnight Irene and making them equally as dull as dishwater. No mean feat.
Albums
That's probably why so many of Monday's Premiership matches were as dull as dishwater, coming just two days after a full New Year's Day programme.
DEREK McGOVERN AT LARGE: Get an edge 2-day
And while the mighty Reds of 2001 can be as dull as dishwater. You have to feel for those forced to commentate on Liverpool.
Sport on TV: pick of the day
It's as dull as dishwater and is not even worthy of background music status.
The Razz: Singles & Albums: Don't bother with.