cackler noun 2forms 1phrases 1 noun2 •A person or creature that cackles. •(slang, no longer used) A speaker; a person who gives speeches.I never wath much of a Cackler, Thquire, and I have thed my thay. — 1854 formscacklers Phrases with cackler autem cacklerA Dissenter; a Protestant who is not a follower of the Established Church (i.e. Church of England, Church of Scotland, etc).