smelly /ˈsmɛli/adjective 3noun 2forms 3 adjective3 •Having a bad smell.She was hesitant to remove her shoes, as her socks were rather smelly. •(informal, figurative) Having a quality that arouses suspicion.The detective read the documents and thought, "Something sure is smelly about this case." •(slang, figurative) Having signs that suggest a design problem; having a code smell.That smelly code needs to be refactored. noun2 •(rare) A smelly person.And I can get home myself, thank you. Little smelly. — 1965 •(informal) a Short Magazine Lee Enfield rifle or one of its derivatives. formssmellies · smellier · smelliest