When you are in a crowded area (a bar or something) and you see someone you know, or else possibly a potential enemy and you get on your tippy toes trying to see over every body in a meerkat stance. Or maybe like drew breesin the pocket.
The act of peeing against a wall or into a bush on a long car journey, generally in groups of 2 or more. The group resembles a mob of meerkats as they are all stood to attention, rapidly looking around to ensure that no-one sees them peeing against a wall, just as a meerkat would look for predators.