hissy in English dictionary hissy Meanings and definitions of "hissy" Accompanied with hisses Making a hissing sound Childish or petulant (compare hissy fit) (US) A tantrum, a fit adjective Accompanied with hisses. adjective Making a hissing sound. adjective Childish or petulant (compare hissy fit). noun (US) A tantrum, a fit. more Grammar and declension of hissy hissy ( comparative hissier, superlative hissiest) hissy ( plural hissies) hissy (comparative hissier, superlative hissiest) hissy (plural hissies) more Sample sentences with "hissy" Declension Stem Try again Available translations Cornish French German Polish Turkish Authors