When describing people, you can really have fun in English! For example, someone who is a person who is generally of good character, but lacks manners, education, or style can be described as a A ROUGH DIAMOND. "my grandfather was a bit of a rough diamond" Another funny example is when you think someone won't be easy to deal with, you might say; SHE'S A TOUGH NUT TO CRACK. This metaphoric expression alludes to hard-shelled nuts like walnuts. Do these translate into your language?