Related Clues:

• Boneheaded
• Ill-advised
• Without much intelligence
• Like Letterman's pet tricks
• Crass
• A bit foolish
• Muscleheaded
• Very silly
• 'Keep it simple, ___'
• Imbecilic
• ''__ Cupid'' (Francis tune)
• 'I'm with ___' (T-shirt phrase)
• "I'm with ___" (T-shirt phrase)
• Unintelligent, really thick
• Not intelligent, thick