adjective
- superlative form of grumbly; most inclined to complain or express dissatisfaction in a bad-tempered way
Usage: informal; superlative degree
Examples
- He was in the grumbliest mood after losing the game.
- The grumbliest member of the team refused to participate in the celebration.
- She gave the grumbliest response when asked about the new policy.
- On Monday mornings, he tends to be the grumbliest person in the office.
- The grumbliest customers were the first to complain about the service.