1. stank-ass - Noun
2. stank-ass - Adjective
stank-ass (not comparable)
(African-American Vernacular, slang, derogatory) Very foul-smelling, stinking, unclean.
(African-American Vernacular, slang, derogatory) A very foul-smelling individual.
(African-American Vernacular, slang, derogatory) A contemptible individual.
Source: en.wiktionary.org