YOU SAID:
My girlfriend is wearing an extremely skimpy slingshot bikini
INTO JAPANESE
私のガールフレンドは、非常に痩せたスリングショットビキニを着ています
BACK INTO ENGLISH
My girlfriend is wearing a very skinny slingshot bikini
INTO JAPANESE
ガールフレンドはとても細いスリングショットビキニを着ている
BACK INTO ENGLISH
my girlfriend is wearing a very thin slingshot bikini
INTO JAPANESE
私のガールフレンドは非常に薄いスリングショットビキニを着ている
BACK INTO ENGLISH
my girlfriend is wearing a very thin slingshot bikini
That didn't even make that much sense in English.