The act of speaking to a friend using Bill Hicks jokes. Or the even simpler act of telling a full Bill Hicks joke to a group of friends to entertain or to possibly introduce them to the comedic styles of Bill Hicks.
Speaking Hicklish also includes using a Bill Hicks joke to go with the situation you may be in, the full joke does not have to be said but instead pieces can interpretated to fit the context of the conversation.
MAN 1- you know, i'm glad all those horrible people who smoke die, i sure will be able to sleep easier.
MAN 2(in hicklish)- hay Bob, you know, ya ready for this? OK, drumroll.......Non-smokers die, everyday...sleep tight Bob.