American pit bull terrier ame·ri·can·pitbullterrier uncommon noun 1. American breed of muscular terriers with a short close-lying stiff coat SynonymsAmerican Staffordshire terrierStaffordshire terrierAmerican pit bull terrierpit bull terrier Related words Broader terms bullterrier WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.