Kendall Jenner makes her TikTok debut with self-deprecating video where she wipes out on snowboard... while KUWTK audio plays of her bragging she is 'literally...

Kendall Jenner finally made her TikTok debut this Tuesday - and proved she is game to make fun of herself. The 26-year-old supermodel indulged in a bit of slapstick humor in her ne…