Bad-mouth and Rag on

Bad-mouth verb - To express scornfully one's low opinion of.

Rag on and bad-mouth are semantically related In some cases you can use "Rag on" instead a verb phrase "Bad-mouth".

Bad-mouth and rag on are semantically related in criticize very harshly topic. Sometimes you can use "Bad-mouth" instead a verb "Rag on", if it concerns topics such as attack with words.