wrangler

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. One who wrangles or quarrels.
2. n. A cowboy or cowgirl, especially one who tends saddle horses.

Century Dictionary and Cyclopedia

1. n. Same as horse-wrangler.
2. n. One who wrangles or disputes; a debater; especially, an angry or noisy disputant.
3. n. A stubborn opponent or adversary.
4. n. In Cambridge University, one who has attained the first class in the elementary division of the public examination for honors in pure and mixed mathematics, commonly called the mathematical tripos, those who compose the second rank of honors being designated senior optimes, and those of the third order junior optimes. The student taking absolutely the first place in the mathematical tripos used to be called the senior wrangler, those following next in the same division being respectively termed second, third, fourth, etc., wranglers. But in the final examination now, to which only wranglers are admitted, the names are arranged in divisions alphabetically. The name is derived from the public disputations in which candidates for degrees were until recent times required to exhibit their powers. Compare tripos.

Wiktionary

1. n. Someone who wrangles or quarrels
2. n. A cowboy who takes care of saddle horses
3. n. A cowboy who takes care of tourists
4. n. An animal handler or trainer
5. n. at the University of Cambridge a student who has completed the third year of the mathematical tripos with first-class honours

GNU Webster's 1913

1. n. An angry disputant; one who disputes with heat or peevishness.
2. n. One of those who stand in the first rank of honors in the University of Cambridge, England. They are called, according to their rank, senior wrangler, second wrangler, third wrangler, etc. Cf. Optime.

WordNet 3.0

1. n. someone who argues noisily or angrily
2. n. a cowboy who takes care of the saddle horses