Gerrymander

v. divide a voting district in a discriminatory manner (for the benefit of a particular candidate); falsify; distort, pervert

n. unfair division of voting districts in order to give an advantage to a particular candidate

Gerrymandering is a form of redistricting in which electoral district or constituency boundaries are manipulated for an electoral advantage. The word "gerrymander" is named for the Governor of Massachusetts Elbridge Gerry (July 17, 1744 –  November 23, 1814), and is a blend (or portmanteau) of his name with the word "salamander," which was used to describe the appearance of a tortuous electoral district pressed through the Massachusetts legislature in 1812--and reluctantly signed into law by Gerry--by Jeffersonian democrats, in order to disadvantage their electoral opponents in the upcoming senatorial election. "Gerrymander" is used both as a verb meaning "to divide into political units to give special advantages to one group" as well as a noun describing the resulting electoral geography. Elbridge Gerry's actual name is pronounced with an initial /g/ (a hard G), but the "jerry" pronunciation is now the normal pronunciation.
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Noun
1. an act of gerrymandering (dividing a voting area so as to give your own party an unfair advantage)
(hypernym) cheat, cheating
Verb
1. divide unfairly and to one's advantage; of voting districts
(hypernym) separate, divide, part

(v. t.)
To divide (a State) into districts for the choice of representatives, in an unnatural and unfair way, with a view to give a political party an advantage over its opponent.
  

The intentional setting of electoral boundaries taking into account traditional voting patterns, so as to attempt to influence the taking of an elected office. - (read more on Gerrymander)