What is a nasty laugh?

A nasty laugh is a derogatory term used to describe a mocking or insidious kind of laughter. It implies that the laughter is malicious, cruel, or intended to cause harm or offense to others. This type of laughter is often associated with negative emotions such as contempt, ridicule, or mockery. It can also be used to create an atmosphere of fear or intimidation. In contrast to a genuine or friendly laugh, a nasty laugh is typically perceived as unkind and unpleasant.