Jokevoting is voting with no real seriousness or purpose. It most often occurs at the start of games, typically with inside jokes or references to previous games as the basis for the jokevoting. Typically it disappears after a day or so, when the "seriousvoting" begins, but sometimes it can last longer, or return spontaneously in the middle of the game.
Many believe it is a "pointless, waste of time that unfortunately plagues most games." This is not an unpopular opinion, and often continuing a jokevote phase after most players feel it's time to move on is often seen as a scumtell. Conversely, ending the jokevote phase "early," either by initiating serious discussion of some sort early in the day or otherwise interrupting people from making jokes, is seen as very "townie."