Somewhat pejorative term for a foreigner, usually a tourist, who happens to be in Spain
and stands out as being pretty obviously not a local. The term is usually used to refer to fairer-skinned people from the likes of Great Britain or Germany, but can be extended to any foreigner that is in Spain.
"Going to a restaurant for dinner at 7 o'clock will make people think you're a guiri"
"Do you even care about Spain's people, culture, language or history? No, all you guiris want is to come here to get drunk and sunburnt."