Another common name is tanga or sometimes string tanga , especially in the German Tanga. A frequent metaphor, especially in Brazil, is dental floss; in Brazil a thong is called fio dental Portuguese for dental floss ; in English, the term "Butt floss" is sometimes used. A Puerto Rican Spanish slang term, used by Reggaeton artists, is gistro. Australians often colloquially refer to the G-string as a g-banger or simply banger. Some names for the thong reference the bareness of the buttocks, as seen in the Spanish word colaless the origin is probably connected to the term topless but in reference to cola, colloquial term for butt in South American Spanish , and in other names the "T"-like shape of the back is highlighted.