Gloomcookie

Gloomcookie is an internet slang term used to refer to a person who often appears sad, gloomy, or melancholic. It is used to describe individuals who have a tendency to display a negative or downcast demeanor.

Examples:
1. Whenever I check social media, Emma is always posting sad or depressing status updates. She has definitely become quite the gloomcookie lately.
2. John’s constant frown and lack of enthusiasm make him a true gloomcookie. It’s hard to be around someone who always seems so down.