hissable

adjective2

1. •
   (informal) Deserving to be hissed or booed; villainous.

   • The French apply the adjective sifflable (hissable) to bad plays and bad actors. — 1890
2. •
   (informal) Capable of being pronounced with a hiss.

   • Thea could almost hiss out the name. In fact, the mayor's name was quite hissable. — 2015