Re: "all brawn and no brains, take you down a notch
Originally Posted by rsb91
1) Yes, someone who is "all brawn and no brains" is a person who is physically strong but mentally slow.
This doesn't necessarily mean that a person is mentally slow. To use this expression when referring to a mentally slow person is insulting, and certainly should not be used. There are many other similarly insulting expressions.
A person who is "all brawn and no brains" is more likely to be someone who takes a physical approach to things, rather than thinking something through clearly.
If I were to carry something heavy up a very long staircase, and didn't see that there was an elevator right beside the staircase, I could also say, "That was all brawn and no brain today!"