zany

Adjective

• like a clown
  • a buffoonish walk
    
  • a clownish face
    
  • a zany sense of humor
    

• ludicrous, foolish
  • gave me a cockamamie reason for not going
    
  • wore a goofy hat
    
  • a silly idea
    
  • some wacky plan for selling more books
    

Noun

• a man who is a stupid incompetent fool

• a buffoon in one of the old comedies; imitates others for ludicrous effect

Related words

• Synonyms: 
  buffoonish , clownish , clownlike , cockamamie , cockamamy , goofy , sappy , silly , wacky , whacky , fathead , goof , goofball , bozo , jackass , goose , cuckoo , twat