I enjoy this game a lot so I thought I'd bring it to the E community.
The game goes like this.
The person will go I'm so tough, cute, smart ect. (It started out as tough and the name just stuck)
Then the next poster puts in the metaphor and he or she says I'm so... and wash, rinse, repeat.
Example: I'm so tough...
Next poster: you can eat soup with a fork.
I'm so smart...
so on and so forth.