GUNSLINGER Meaning of GUNSLINGER in English gun ‧ sling ‧ er /ˈɡʌnˌslɪŋə $ -ər/ BrE AmE noun [countable] American English informal someone who is very skilful at using guns, especially a criminal Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012