Guiri

Guiri (pronounced: [ˈɡiɾi]) is a colloquial Spanish name used in Spain applied to foreigners. The term guiri is a popular name for gorse (Ulex europaeus), a spiny bush with yellow flowers.

Source

According to the Real Academia Dictionary, this word can be traced back to 19th century Carlist Wars in the form "guiristino," the pronunciation of Basque-speaking Carlist forces of the name of their enemies, the Cristinos (after regent Queen Maria Cristina).

"Guiri" is used by the inhabitants of Reus for visitors from near the city of Tarragona. It is also widely used as a depreciative term by inhabitants of the Balearic islands, Mallorca, Ibiza and Menorca, as well as the Costa del Sol, for pale visitors usually from European countries. A brief web search of the term "los guiris" is sufficient to see its widespread use, although a depreciative term in some areas, in many Spanish sites and even local TV and Radio.

Finally, there is a theory that it derives from Moroccan Arabic gaouri, which in turn stems from Ottoman Turkish gâvur.