"Guiri" is local slang for foreigner, especially a tourist. My friends disagree on whether foreigners who aren't Caucasians are guiris. The term is humourous and mildly negative.
The last trend I have seen in guiris: when a family has little girls, they are wearing the traditional dress that us locals only wear on a couple of holidays a year. Definitely not on a normal day out. Besides, the dresses look odd in the children because they are supposed to be very, very tight, but the guiris wear them like you would a normal dress, slightly loose. I still haven't decided if this is all ludicrous or kind of cute.