whiner
nounUK /ˈwaɪnə/
US /ˈwaɪnər/
A whiner is someone who complains a lot about small things.
My little brother is a whiner who cries whenever he loses a game.
OTHER MEANINGS
2. A person who makes a long, high, sad sound.
The whiner in the back row kept making noises during the movie.
3. A dog or animal that makes a soft crying sound.
The little puppy was a whiner whenever it wanted food.
4. Someone who complains instead of trying to fix the problem.
Don't be a whiner—try again and you might win next time.