Answer: jeerer

AnswerCrossword Clue
JEEREROne who heckles
JEEREROne who scoffs
JEERERFan that's unhappy
JEERERScoffer.
JEEREROne kind of baseball fan.
JEERERMocking one.
JEERERRude critic
JEERER"Boo bird"
JEEREROne who hoots
JEERERHeckler
JEERERVocal opponent
JEERERBoo-bird, e.g.
jeererone who jeers (to mock (to ridicule))
jeererderide with jeers taunt
jeererto speak or cry out with derision or mockery