(as) dull as ditchwater

phrase

British, informal

: very boring

The book is as dull as ditchwater.

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(as) dull as dishwater

(as) dull as ditchwater

ASE

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“(as) dull as ditchwater.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/%28as%29%20dull%20as%20ditchwater. Accessed 12 Mar. 2026.

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(as) dull as ditchwater

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