prank 
/ˈpræŋk/ noun
plural pranks /ˈpræŋk/ noun [count] : a trick that is done to someone usually as a joke
▪ a childish prank ▪ He enjoys playing pranks on his friends. ▪ (US) He's always pulling pranks.
▪ a childish prank ▪ He enjoys playing pranks on his friends. ▪ (US) He's always pulling pranks.
