fakie on a skateboard means switch nollie basically. its where your riding switch but you pop off the nose, so its really like doing a regular ollie but just turned around. it gets all fucked up when you try to apply it to skis because everything is different. Although some deny it, switch and fakie are really the same on skis. if you wanna be technical, fakie on skis would be if you pop off your tails (downhill of you) while riding backwards, and switch would be if you pop off your tips. while riding, you are technically not in switch or fakie because (in skateboarding, where it comes from) switch vs fakie depends on how your feet are set (at the nose or tail).