Refers to someone who comes from the French Basque country and were seen as "other" by the Spaniards when they arrived in Spain in the middle ages. So, as the language evolved, and the Spaniards wished to speak disparagingly of a foreigner, they might call him a Gavacho. When the indigenous people of Mexico were learning Spanish, and heard the word, they incorporated it into the language too. Though the true etymology of the word refers to a person of French heritage from the Basque region it is now commonly used to refer to any and all Anglo-Americans.
White American. Not to be confused with Gringo, which is usually considered derogatory, Gavacho is a friendlier way to denote White Americans. Usually any word used in conjunction with Pinche is derogatory, such as Pinche Gringo, Pinche Gavacho, Pinche Americano, Pinche loco, etc.
To be in appearance or manner like a small cute furry creature. A Gavish person will often strangely reminded people of a puppet from a film like Labyrinth. Gavish people have a complete inability to intimidate.