• Bad-mannered
• Base in values
• Boorish
• Churl fish
• Co-stars not to be crude
• Coarse-grained
• Coarse; unfeeling
• Crude
• Crude and rude
• Far from tactful
• Grossly dull
• Grossly stupid
• Hardly genteel
• Hardly refined
• Hardly refined or genteel
• Hardly sensitive
• Ill-bred
• Ill-mannered
• Indelicate
• Inelegant
• Insensitive
• Insensitive; boorish
• Lacking couth
• Lacking delicacy
• Lacking politeness
• Lacking refinement
• Lacking sensitivity
• Like a yahoo
• Not slick
• Not sophisticated
• Not very polite
• Oafish
• Obtuse
• Philistine
• Scars comes from being stupid
• Tacky
• Tactless
• Totally unrefined
• True '70s punk band
• Uncouth
• Undisguised
• Unmannered
• Unpolished
• Unrefined
• Vulgar
• Vulgar scars
• Without couth
• Yahoolike
crass ignorance - полное невежество
crass stupidity - совершеннейшая /полнейшая/ глупость
1. полный, совершенный
~ ignorance - полное невежество
~ stupidity - совершеннейшая /полнейшая/ глупость
2. (непроходимо) глупый
3. редк. грубый, плотный