Praise be to Allah.
There is nothing wrong with humorous talk and joking, if it is truthful, especially if it is not done a great deal. The Prophet (peace and blessings of Allaah be upon him) used to joke but he never said anything but that which was true. But if it involves telling lies, then it is not permissible, because the Prophet (peace and blessings of Allaah be upon him) said: “Woe to the one who speaks and lies in order to make people laugh; woe to him, woe to him.” Narrated by Abu Dawood, al-Tirmidhi and al-Nasaa’i with a jayyid isnaad. And Allaah is the Source of strength.