adj

• Tending to float on a liquid or to rise in air or a gas; buoyant.
  "I then told my Lord of Eſſex that mine vvas a floaty ſhip and vvell appointed for that ſervice; […]"
• (figurative)
  "All the floaty music in the world could not disguise my grunts [during a massage] as I clenched my teeth and curled my toes to fight the pain."
• (figurative)
  "O here is a Bed / Shrinkproofer than that, / A floatier, boatier / Bed than that!"
• (figurative)
  "[A]s you stand on the steps of the Castle Green in this strange place, you feel quite floaty. This you are told is the scene of the Merthyr riots; and you feel still floatier as you body forth before your eyes a picture like the following— […]"

noun

• (chiefly US)
  "I am going to begin with a confession that seems to me to be startling less for its content than for the sheer number of similar stories that I have heard related among so many of my successful women friends. Prevalent as it is, it always surfaces abruptly, bobbing awkwardly as a lone yellow floatie in the public pool of our conversations."
• (chiefly US)
  "As an escaped megalodon swims close to a busy beach, we see humanity at its most chompable: chubby kids in floaties, doofuses on pontoons, some dork in a tight Speedo rolling around in one of those big inflatable Zorb balls. But alas, the movie is a gore-free PG-13, and though CGI has long since replaced animatronics as the monster movie's weapon of choice, one thing hasn’t changed: giant killer fish still look like they’re made of rubber."