頭の空っぽな者ほど良くしゃべる。の英語

Empty vessels make the most sound.

The less men think, the more they talk.

a silly empty-headed person

Empty vessels make the most sound.

a state of cleverness, good speech and behaviour

You should pay attention to what fine‐spoken people say.

being completely bald

the degree to which actions and/or thinking are clever

task a person's brain

He is a level-headed man.

He has a clear head

He is clear-headed.

having a clear mind

a person who mentally slow

People are likely to be deceived by a smooth talker.

the crown of the head

“Mind your own business.”【イディオム・格言的】

Mind your own business!

Tend to your own affairs.

the condition of being clever

You gotta have some smarts.

rap a person on [over] the head

I feel listless and have a throbbing headache.

You've got a one-track mind.

My head is full with that.

I have a lot on my mind about that.

He has a clear head.

stupid and dull

of a person's head, to be bald in patches

Better be the head of a cat than the tail of a lion.