jumping Frenchmen of Maine

noun plural

jump·​ing French·​men of Maine ˌjəmp-iŋ-ˌfrench-mən-əv-ˈmān 

: individuals who exhibit a nervous condition characterized by involuntary jumping movements upon being startled, sometimes echolalia, suggestibility and impairment of the will, and inability to concentrate and who are usually of French descent and from lumbering regions of Maine