unfeasibly

comparative more unfeasibly · superlative most unfeasibly

1. In an unfeasible manner; not feasibly; to a degree that is impossible or impractical.

   That the Clash never performed at Glastonbury is more upsetting still, not least because Joe Strummer was 'a good friend of ours'. 'They were meant to play,' says Eavis, tugging at his unfeasibly tight blue shorts.

   2008 May 18, Paul Mardles, “The case study: Michael Eavis”, in The Observer