Word Origin & History
jape
c.1300, "to trick, beguile," perhaps from O.Fr. japer "to howl," of echoic origin, or from O.Fr. gaber "to mock, deride." Phonetics suits the former, but sense the latter explanation. Took on a slang sense c.1450 of "have sex with," and disappeared from polite usage. Revived in harmless M.E. sense of "say or do something in jest" by Scott, etc.