Guero is ment as a person who is light skinned with Caucasian features but not Caucasian and is a very cool person who has a bigger dick then most people
Guero is actually a bastardization of the word "guerrero" which means warrior in Spanish. The use of "guero" dates back to the Spanish-American war where the American soldiers (or warriors) were referred to as gueros by the Spanish and Mexican soldiers.
Whitey. Pale one. Honkey.
Guero is for guys, guera for girls. When used among friends, it's like calling someone dude. When used with people you don't know...watch your ass.
?Que ondaGuero? I saw your novia eating Doritos with some other cabron...Sorry!