I'm on a boat parody!

I'm on a boat isn't a parody. It's an actual song.

...seriously?

It's a parody of rap videos in which rappers act tough, every other word is an expletive, and brag about their money / girls / whatever. That's why it's funny. The fact that it features T-Pain is just an extra touch that makes it that much more awesome.

This is an example: http://www.youtube.com/watch?v=PWeNNLL8YHw