herbert
n. countablen. a person who is a bit silly, boring, or socially awkward. It is a gentle way to call someone a fool or a bit of a loser.
n. a foolish, socially inept, or unremarkable person. British slang in register; typically used as a mild pejorative to describe someone perceived as dull or incompetent.
Don't be such a Herbert and just ask her for help.
The office was full of boring Herberts who only ever talked about their spreadsheets and weekend gardening.
He was often dismissed as a harmless Herbert by his peers, though his quiet exterior masked a sharp, observant mind that missed very little of the social dynamics at play.
From Old French Herbert, from Frankish *Hariberht.
Commonly used in British English; often preceded by the adjective 'harmless' or 'complete'.