To think if someone’s stupid, it’s really hard to describe them without either being called out for being disablist or using an expletive?

[Windthebobbinup1982]

If I say moron, idiot, cretin etc. I risk being called disablist...
So I’m basically reduced to using words like dick, twat, cock etc... which you can’t really use in polite company...

Is there any noun to describe someone who's stupid without doing one or the other?

And by ‘stupid’, I don’t mean someone who is unintelligent, I mean someone who’s acting in a way that’s at odds with their intelligence.
I

I use “Ill though out” far too much OP but I generally find it useful because it’s better to criticise the idea than the person.

Terry Fuckwit is a Viz character.

Terry Fuckwit is a Viz character

Cheers for that Einstein, I know.....