tasteless
taste-less
adjective
Having no distinct flavour; bland or insipid.
"The hospital food was utterly tasteless."
adjective
Showing poor judgement or lack of style; vulgar or crude.
"Her new outfit was rather tasteless."
Thesaurus
Synonyms: savourless, unsalted, nonflavored, nonflavoured, flavourless, vapid, savorless, flat, unflavoured, flavorless, bland, unflavored