A bad-tempered person is often referred to as a CRANK, GROUCH, or CRABBY. These terms are used to describe someone who is irritable, grumpy, and easily annoyed. A CRANK is someone who is difficult to please and often complains about minor issues. A GROUCH is someone who is always in a bad mood and is quick to express their displeasure. Lastly, a CRABBY person is someone who is short-tempered and often expresses their anger in an aggressive manner.