Nouns

(n)prankster, cut-up, trickster, tricker, hoaxer, practical jokersomeone who plays practical jokes on others
(n)deceiver, cheat, cheater, trickster, beguiler, slickersomeone who leads you to believe something that is not true
(n)trickstera mischievous supernatural being found in the folklore of many primitive people; sometimes distinguished by prodigious biological drives and exaggerated bodily parts