expressions to describe a foolish person

[Olenek]

Hi,

There are some phrases with the sense "to be foolish":

To have nothing between one's ears;
Daft as a brush;
Not to know enough to come in out of the rain;
To be slow in the uptake;

Do you use/ know other phrases with the same sense?

Thanks for all your replies!

[Tdol]

Most of those (1,3 & 4) are more to do with stupidity/low intelligence, aren't they?

[Mr_Ben]

I agree with Tdol, there's a difference between being stupid and foolish.

But while we're talking about stupid people, you can say someone is:
as thick as a brick
as dumb as a post
a few sandwiches short of a picnic
not the sharpest knife in the drawer
not the brightest bulb in the chandelier

[BobK]

And I rather like 'at the shallow end of the gene pool'.

b

[Olenek]

Most of those (1,3 & 4) are more to do with stupidity/low intelligence, aren't they?

Can we also use "To be soft in the head" in this context?

[Tdol]

Yes, and thick as a plank (or two short planks), bottom feeder, dipstick, etc

[Judge Brybe]

Yes, and thick as a plank (or two short planks), bottom feeder, dipstick, etc

Actually, I was under the impression that 'bottom-feeder' is someone dating his friend's ex?

[Judge Brybe]

"to be foolish"

to horse around (to act foolish)?