Grumps are individuals who often display a sour or irritable demeanor. They may be quick to express dissatisfaction or annoyance, which can affect their interactions with others. This behavior can stem from various factors, including stress, fatigue, or personal issues. In popular culture, grumps are often depicted in media, such as in cartoons or movies, where they serve as comic relief or as a foil to more cheerful characters. The term can also refer to specific characters, like Eeyore from Winnie the Pooh, who embodies a perpetually gloomy outlook.