1 definition by ms. cellaneous
a very disturbing type of swimwear which consists of a bikini morphed together with a thong; has the ability to make one feel awkward when seeing it on someone
person1: Did you see that woman?
person2: Omg, she was wearing a thongkini!
person3: I think i feel awkward.
person2: Omg, she was wearing a thongkini!
person3: I think i feel awkward.
by ms. cellaneous September 12, 2007