antic

Adjective

• ludicrously odd
  • Hamlet's assumed antic disposition
    
  • fantastic Halloween costumes
    
  • a grotesque reflection in the mirror
    

Noun

• a ludicrous or grotesque act done for fun and amusement

Verb

• act as or like a clown

Related words

• Synonyms: 
  fantastic , fantastical , grotesque , joke , prank , trick , caper , put-on , clown , clown around