play a joke on v 1: subject to a playful hoax or joke [syn: {hoax}, {pull someone's leg}, {play a joke on}] 2: deceive somebody; "We tricked the teacher into thinking that class would be cancelled next week" [syn: {flim-flam}, {play a joke on}, {play tricks}, {trick}, {fob}, {fox}, {pull a fast one on}, {play a trick on}]