A surly person is someone who is unfriendly, bad-tempered, and often rude. The term can be broken down into four crossword solutions: GRUMP (5 letters), CHURL (5 letters), CUR (3 letters), and CRAB (4 letters). GRUMP is a synonym for a grumpy or irritable person, while CHURL is an archaic term for a rude or ill-mannered person. CUR is an insulting term for a mean or cowardly person, and CRAB is a slang term for someone who is easily annoyed or irritated.