When a person or object performs a seemingly unachievable contortion or is in an otherwise complex physical position.
Refers to the painting "Grande Odalisque" by Ingres, in which the subject lounges in an apparently simple yet impossible position due to an unrealistic anatomy.
"Like THAT. Your elbow's over there and your head is faced over here and... well, I didn't even know legs could turn that way."
"Oh. Years of yoga can get you pretty Odalisquesque."