Also found in: Dictionary, Thesaurus, Medical, Encyclopedia.

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

*dull as dishwater

 and *dull as ditch water
very uninteresting. (*Also: as ~.) I'm not surprised that he can't find a partner. He's as dull as dishwater. Mr. Black's speech was as dull as dishwater.
See also: dishwater, dull

be as dull as dishwater/ditchwater

to be very boring He loved the book but I thought it was as dull as ditchwater.
See also: dishwater, dull

dull as dishwater

Boring, tedious, as in That lecture was dull as dishwater. The original simile, dull as ditchwater, dating from the 1700s, alluded to the muddy water in roadside ditches. In the first half of the 1900s, perhaps through mispronunciation, it became dishwater, that is, the dingy, grayish water in which dirty dishes had soaked.
See also: dishwater, dull

(as) dull as dishwater

mod. very dull. Life can be as dull as dishwater.
See also: dishwater, dull

dull as dishwater

See also: dishwater, dull
References in periodicals archive ?
To an unaccustomed European palate, it tastes like dirty dishwater - but may have inspired his dancing.
An extended run in the competition would generate extra revenue for the province, but when asked whether it would render Munster's season a success, McGahan was as clear as dishwater.
But the putrid smell and insipid brew tasted like stewed, rotten vegetablesin dishwater.
But while most of them taste like dishwater, he claims Costa Express will be a "vast improvement" because the machines use ground coffee and fresh milk.
The terrified cat is then picked up by the scruff of the neck and put in a freezer before being shoved into a bowl of dishwater.
But the music was derivative and as dull as dishwater.
They are also used in cosmetics and toiletries industries to manufacture fabric softeners, personal-care products, textile manufacturing, gas treatment and dishwater detergents.
There are some libraries that are as dull as dishwater and some libraries that don't really welcome people and are there for the storage of books.
What a far cry from Starbucks' "origin days" in Birmingham - when each brew resembled dishwater.
Before Roche was mayor, all dishwater, sewage and industrial waste were funneled into the Chicago River, which emptied into Lake Michigan.
There is a double drainer sink unit with mixer tap over, a built in oven and hob, an integrated dishwater, and part-tiled walls.
cation family kitchen featuring a corian sink with mixer tap, single oven, combination microwave, fridge freezer, ceramic hob, hood and dishwater.
Reuse your dishwater by watering your plants outside and inside.
These products often become slippery and hard to handle when wet from rain, humidity, sweat, dishwater or other commonly encountered substances.
THERE'S no denying that some Sunday racedays are as dull as dishwater, but others, like today's, have a bit of everything.