A crashing bore

Pro Tip 1/3

Strong Disinterest

Emphasizes that the subject is so boring it's almost impressive.

The lecture was such a crashing bore, I almost admired the speaker's dedication to dullness.

Pro Tip 2/3

Informal Use

Used in casual conversation, not in formal writing or speeches.

My date turned out to be a crashing bore with endless stories about traffic.

Pro Tip 3/3

Slight Rudeness

Can be seen as offensive if used directly about someone in their presence.

Be careful not to call someone a crashing bore in a social setting; it's quite rude.