Definition of jeer:
(n) :
a railing
remark or reflection; a
scoff; a
taunt; a biting jest; a flout; a jibe; mockery; a gear; a tackle
"midas, exposed to all their jeers, Had lost his art, and kept his ears. -
Swift"
(v) :
to utter sarcastic or scoffing reflections; to speak with mockery or derision; to use taunting language; to scoff; as, to jeer at a speaker; to treat with scoffs or derision; to address with jeers; to taunt; to flout; to mock at
"but when he saw her toy and gibe and jeer. -
Spenser"