cat burglar
From Longman Dictionary of Contemporary EnglishRelated topics: Crimecat burglarˈcat ˌburglar noun [countable] SCCa thief who enters a building by climbing up walls, pipes etcExamples from the Corpuscat burglar• Auguste flashed around busily, trying to reconcile these people with Rose's cat burglar.• Although he was to become Britain's most successful cat burglar, Peace showed no early aptitude, and was frequently arrested.• Even Rose had no proof that the cat burglar was in Cannes.