Galiant is a mixture of two words; Valiant (Possessing Courage and Determination), and Gallant (Grand, Fine). This is what you call someone who excels at anything they play, mainly videogames. This word can be used to describe someone, or used as a proper noun.
You are such a Galiant gamer!
by Galiant April 11, 2011
Being heroic on a horse
He was very galiant on his white horse.
by Dr. Ience March 29, 2015