backwards tortoise
A fictitious yoga pose which requires incredible flexibility where a person shoves their head up their own ass. Used mainly toward arrogant yoga aficionados.
Girl: Yoga is so good for your heart and soul; it's way better than lifting weights.
Guy: Oh yeah? Well, why don't you go perform the backwards tortoise then, bitch.
Guy: Oh yeah? Well, why don't you go perform the backwards tortoise then, bitch.