Wheeny or Issi is the name for a small car in an online game "Grand Theft Auto V" aka GTA-5. Car visually looks like and it drives like Mini Cooper S R53/R56 and R52 convertible (1-st and 2-nd generation). The Issi is one of the smallest civilian cars in the Game.
Is when you pull-down your pants and expose your half-staff penis to another person, group of people, or while riding in a moving vehicle for others to view, then grasp the base of the penis and "wave" it to the watching people.