dappa

British slang for someone who is silly, scatterbrained, or endearingly dim — not malicious, just not operating at full capacity. A dappy person forgets their keys, laughs at the wrong moment, and says the wrong thing with total sincerity. The word carries more affection than insult; calling someone dappy is closer to 'bless them' than a genuine criticism. Common in Northern England and widely understood across the UK.

(UK, colloquial) daft, foolish.

(Geordie, pejorative) An idiotic and ill-mannered person.

A person feigning stupidity.