From Longman Dictionary of Contemporary Englishcat burglarˈcat ˌburglar noun [countable] SCCa thief who enters a building by climbing up walls, pipes etc
Examples from the Corpus
cat burglar• Auguste flashed around busily, trying to reconcile these people with Rose's cat burglar.• Actually, Rutledge is a thief who employs his abused, trained ape Dunston as a simian 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. 