Ma'anar ƙamus na kalmar "mummunan ɗabi'a" tana nufin ɗabi'un da ake ɗauka mara kyau, rashin kunya, ko rashin dacewa a cikin yanayin zamantakewa. Yana iya haɗawa da ayyuka kamar katse wasu, yin magana da bakinka, rashin faɗin don Allah ko godiya, da yin amfani da harshe mara kyau, da dai sauransu. Ana yawan kallon munanan ɗabi’a a matsayin alamar rashin mutuntawa kuma suna iya yin mummunar tasiri ga mu’amala da mu’amalar mutum.