Surliness usually implies a negative, unfriendly attitude that makes others feel uncomfortable. The waiter's surliness left a bad impression on the diners.
Pro Tip 2/3
Body Language
Surliness is often shown through body language, such as frowning, avoiding eye contact, or crossing arms. His surliness was evident as he scowled at the request.
Pro Tip 3/3
Not Always Verbal
Surliness can be communicated non-verbally; it's not just about what is said, but how it's expressed. She could sense his surliness despite his silence.