A hardass or
hard ass is someone who is very
authoritative or who appears to be such. This type of person will have his or her own way and expects the respect and co-operation of others.
This is someone who won't let you get away with anything. Someone who falls into this category usually offers a lot of
tough love and tends to lack empathy for other people.
As long as you show a good level of respect in a hardass' presence, you should be fine. They prey on teenagers and those who are feeble-minded.