bad taste
/ˌbad ˈteɪst/noun
Poor, indelicate, or undiscriminating judgement, especially with regard to what is aesthetically pleasing, polite, socially appropriate, or fashionable; (hence) something which results from or embodies this.
adjective
Of, displaying, or embodying bad taste.
Origin
Late 17th century; earliest use found in John Dennis (1658–1734), literary critic. From bad + taste.