You start to do an awkward turtle but instead of using your thumbs, you accidentally use your pinky fingers. This is a social fail and so to save embarrassment you pull your hands back in with both your thumbs and pinky fingers clenched in. This is the Fail Whale.
Sophia: OMG Rhys! You know Siobhan?
Rhys: Yeah she's a total social hand grenade.
Sophia: I know right? Well she just did a massive Fail Whale and everyone decided to throw her into the ocean. How ironic!
Rhys: Alanis Morissette butchered that word. Never speak of it again.