A chess player of the highest caliber and greatest skill. Only the strongest of professional chess players, typically having a FIDE rating of 2600 and above. A vary prestigious and rare occurrence, only 400 or so living in the world. The United States Champion would be a Grandmaster.
The state champion at age 13, Daniel was touted as a possible future Grandmaster.

He beat everyone in the city with ease, but was demolished when he finally played a real Grandmaster.
by Schweinsberg July 26, 2004
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A Grandmaster is someone who asserts male dominance in the presence of females in an attempt to impress them. A trait of a Grandmaster is to throw up a spiderman hand symbol in all pictures, this hand signal tells all other males to stay away because the Grandmaster has claimed his territory.
That kid is pulling a grandmaster in front of all these girls.
by Ronald McLikesChildren March 31, 2019
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Grandmaster is a rank I'm overwatch that only the top 1% can achieve
Ed:"Last week I finally hit grandmaster"
Leo:"I can't seem to get out of silver"
Ed:" maybe stop playing hanzo"
by Duck man 4 September 10, 2017
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A person of the upmost uberness, a banterholic of the greatest degree and leader of the grandmaster alliance.
In the beginning grandmaster created the banter and the alliance.
by Harold Shippman April 29, 2005
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