Keywords: joke, gag (joke), joker, jest
Sign Definition
As a Noun
                                            1.  Something that is said or done to make you laugh, for example a funny story. English = joke, gag.
                                          
                                          
                                        
                                            2.  A person who tells jokes. English = joker.
                                          
                                          
                                        
                                            3.  In a pack of cards, a card which does not belong to any of the four suits. English = joker.
                                          
                                          
                                        As a Verb or Adjective
                                            1.  To tell funny stories or say things that are amusing or not serious. English = joke. Formal English = jest.
                                          
                                          
                                        
                                            2.  To make fun of people in a gentle but slightly cruel way, especially by telling them things which are not true which they believe. Idiomatic English = pull someone's leg.
                                          
                                          
                                         
                  
                      