jest in WordNet English dictionary

1. a humorous anecdote or remark intended to provoke laughter
   "he told a very funny joke"; "he knows a million gags"; "thanks for the laugh"; "he laughed unpleasantly at his own jest"; "even a schoolboy's jape is supposed to have some ascertainable point"
   joke  gag  laugh  jest  jape 
   
2. activity characterized by good humor
   jest  joke  jocularity 
   

1. act in a funny or teasing way
   joke  jest 
   
2. tell a joke; speak humorously
   "He often jokes even when he appears serious"
   joke  jest