Several Idioms to describe people 1. 'a cold fish' - a person who does not show emotions and does not seem very friendly 2. 'as hard as nails' - a person who does not have sympathies 3. 'a pain in the neck (ass)' - a person who always annoys you and disturb you 4. 'someone heart is in the right place' - a person has only good intentions 5. 'an awkward customer' - a person or group of people who cause the problems because they behave themself as you did not expect 6. 'a real know-all' - a person who knows a lot of things and always wants to demonstrate their knowledge and it annoys 7. 'a high-flyer' - a successful person who will be famous or wealth 8. 'a bit of a loner' - a person who avoids meetings with friends and prefers to be alone