picklepuss
/ˈpɪkəlˌpʌs/
noun
- A person who is habitually grumpy, sullen, or has a sour facial expression.
- My uncle is a real picklepuss in the morning before he has his coffee.
- The toddler was a picklepuss after missing her nap.
- Don't be such a picklepuss—the weather is beautiful today!