— bad-mouther , n.
/bad"mowth'/ or, sometimes, /-mowdh'/ , v.t., bad-mouthed, bad-mouthing .
Slang. to speak critically and often disloyally of; disparage: Why do you bad-mouth your family so much? Also, badmouth .
[ 1935-40; orig. a curse, spell (the sense recorded in Gullah); cf. Vai (Mande language of Liberia and Sierra Leone) dà n y à mà curse, lit., bad mouth ]