hissable

From hiss +‎ -able.

hissable (comparative more hissable, superlative most hissable)

1. (colloquial) Capable of being pronounced with a hiss.
   • 2015, Cathy Elliott, A Stitch in Crime:

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

2. (colloquial) Deserving to be hissed or booed; villainous.
   • 1890, Parry's Monthly Magazine, volume 6, page 29:

     The French apply the adjective sifflable (hissable) to bad plays and bad actors.