Okay, this might not actually be my LEAST favorite song. I can think of a lot of others that I can't stand at all, starting with gangster rap. This is, however, the most ANNOYING song I can think of.
Parry Grip appears to be this generation's Weird Al. Here is what makes this song so annoying: It's actually pretty good. I laughed the first 75 times I heard it. Once my kids started singing it repeatedly, though, it got on my nerves.
Go ahead. Give it a listen. The songs actually not too bad. Just don't come to my house singing it, please.