an extremely stupidindividual who really likes Tyler the Creator. is a derivative of the term "dumbass." It's typically exchanged favourably between two fans of Tyler the Creator's songs.
A dooduet is when two people are going the bathroom and decide to break out in song. This trend became popular in the late 1900s in both public and private bathrooms alike. It is not uncommon for someone to sneak into the bathroom while someone else is showering and start a dooduet by surprise. The more advanced someone becomes at a dooduet the more they can start to throw in a flatulent, a stomping of the feet, or a banging of the hands on a stall to add an instrumental beat.