Learn English – A word or phrase for someone who is dull and unaware of it

phrasesword-choice

Is there a good word or phrase for to describe someone is generally dull, but believes themselves to be exciting and is unaware that talking to them is laborious?

Best Answer

Dull and unaware of it sounds like a 'drain'.

As opposed to a 'radiator', someone who lights up a room and stimulates.

Drains suck the life out of a conversation or situation and make you desperate simply to be away from them. Radiators are able to make a disaster bearable and even fun!