Haggle v. t. : To cut roughly or hack; to cut into small pieces; to notch or cut in an unskillful manner; to make rough or mangle by cutting; as, a boy haggles a stick of wood.

Haggle v. i. : To be difficult in bargaining; to stick at small matters; to chaffer; to higgle.

Haggle n. : The act or process of haggling.

Example:
How much can I Haggle the price down for this guitar at Guitar Center?

Taxonomy
haggle, hag, Merriam-Webster Online Dictionary, Dictionary, webster, Word Games, Webster Online Dictionary with audio pronunciations, glossary, english, language, ESL, gle, Inflected, gled, gling, Etymology, frequentative, transitive verb.

Defination from the web:
haggle from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. ... 2 archaic : to annoy or exhaust with wranglingintransitive verb : bargain, wrangle <haggling over the price> — hag·gler -g(ə-)lər noun ...