He wears a ten-dollar hat on a five-cent head proverb
He is rich but also stupid.
His family is wealthy but he is not well-educated. That's why he wears a ten-dollar hat on five-cent head.
I had been completely seduced by his flashy appearance until I found that he wears a ten-dollar hat on a five-cent head.
To have no money
Extremely stupid
Very stupid, or silly
Used to describe someone who is naive, gullible, inexperienced, easily fooled, ignorant, unsophisticated, etc.
To say, or believe something or someone that seems completely crazy, delusional, or stupid
To be very wet
Because of forgetting bringing an umbrella, I look like a drowned rat when it rains.