The students were very disgruntled when the teacher made them stay in at lunchtime.
A group of disgruntled fans threw their drinks at the team bus.
The postman was disgruntled with his new boss.
Our boss received hate mail from a disgruntled former employee. A group of disgruntled fans threw snowballs at the team bus. He was disgruntle because he didn't make the team.
When the supervisor shortened everyone's break by 10 minutes, he had a bunch of very disgruntled employees.