A bathing suit composed of a tank top and the lower half of a bikini.(noun)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "tankini" in a sentence
"A tankini is my tribute to the bikini I want -- that's still in my drawer, in fact, so I can stare at it fondly -- but will Never Wear Again."
"To be fair, I also tried to talk her into posting a photo of herself in a "tankini" or a really low cut "halter top" in lieu of the bikini picture request that she initially declined."
"Times I had heard the word "tankini" before I watched this episode:"