Jeer n. : A gear; a tackle.

Jeer n. : An assemblage or combination of tackles, for hoisting or lowering the lower yards of a ship.

Jeer 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.

Jeer v. t. : To treat with scoffs or derision; to address with jeers; to taunt; to flout; to mock at.

Jeer n. : A railing remark or reflection; a scoff; a taunt; a biting jest; a flout; a jibe; mockery.

Example:
Did Obama mean by reaching across the aisle that he planned to Jeer, taunt and belittle Republicans?

Taxonomy
jeer, Merriam-Webster Online Dictionary, Dictionary, webster, Word Games, Webster Online Dictionary with audio pronunciations, thesaurus, glossary, english, language, ESL, Search, jir, Etymology, origin unknown, intransitive verb, derision, deride.

Defination from the web:
jeer from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. ... intransitive verb : to speak or cry out with derision or mockerytransitive verb : to deride with jeers : taunt. synonyms see scoff. — jeer·er noun ...