A beached whale.

a giant whale who appears at times of epic fail.

Beached whale or Immense Epic Fail

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.

An ignorant obese person who does not know his/her place in life. It often shows by being the loudest, most obnoxious person in the room, as an attempt to make up for his/her obesity.

A person who fails very badly, Mark Gilbert Delorme

Epic failure, loaded with embarrassment, consistent with blogging mishaps in the tumblr community.