ballooniest

Adjective

balloony (comparative balloonier, superlative ballooniest)

1. Tending to balloon
   • His low-cut shirt-collar and narrow silken neck-tie were in the style called "English," as quite decidedly, also, were his cross-barred trousers of balloony build; nor, although thus flinging himself for diversion into the vortex of the lower crowd, had he foregone the luxury of tan-colored kid...1861, Various, Atlantic Monthly Volume 7, No. 40, February, 1861