be all brawn and no brain(s)

To have great power or physical strength but lack mental acuity or intelligence. He may have been a good football player in high school, but he was all brawn and no brains, so he didn't get into any colleges.

Common Names:

Name	Pronounced	Usage
Antal	-	Hungarian
Ilma	EEL-mah	Finnish
Devin	['devin]
Mongkut	-	Thai
Om	-	Indian, Hindi, Marathi
Robbie	['rɔbi]