blech + -ous, presumably under the influence of similar-sounding words such as treacherous and lecherous.
bletcherous (comparative more bletcherous, superlative most bletcherous)
- (slang) Having an unaesthetic design or functionality; ugly.
2009 April, James Mitchell, Good Gay Poems, 1967-2007, San Francisco: Ithuriel's Spear, page 26:
- […] my immaculate person, once a wanton playground for every manner of sexual ecstasy, is now a sickening melange of bletcherous flab, fugitive follicles, degenerative cellulite […]