Source : Webster's Revised Unabridged Dictionary (1913)

Floaty \Float"y\, a.
   Swimming on the surface; buoyant; light. --Sir W. Raleigh.

Source : WordNet®

floaty
     adj : tending to float on a liquid or rise in air or gas; "buoyant
           balloons"; "buoyant balsawood boats"; "a floaty scarf"
           [syn: {buoyant}]
     [also: {floatiest}, {floatier}]