As a noun hissies
is .
As an adjective hissiest is
(hissy).
hissiest
English
Adjective
(head)
(hissy) hissy
English
Adjective
(er)
Accompanied with hisses
Making a hissing sound
Childish or petulant (compare hissy fit)
Derived terms
* hissy fit
* tissy
Noun
(hissies)
(US) A tantrum, a fit