glib

Adjective

• artfully persuasive in speech
  • a glib tongue
    
  • a smooth-tongued hypocrite
    

• having only superficial plausibility
  • glib promises
    
  • a slick commercial
    

• marked by lack of intellectual depth
  • glib generalizations
    
  • a glib response to a complex question
    

Related words

• Synonyms: 
  glib-tongued , smooth-tongued , pat , slick