Noun. Cylindrical light-stock cardboard tube used to wrap toilet paper and paper towels, among myriad other paper and card stock products. Once the paper is exhausted and it is no longer used in its original capacity, it is used to trumpet one's voice around the room or venue in similar fashion to a megaphone.
My dad sounds so ridiculous when he uses that derder to make a duck call.
A person that tends to be negative and has an obsession with Logan Paul. This person might have a big family and tends to be emotional and an unstable raging wreck.
Chanel: Hey deremy what are you doing?
Deremy: Leave me alone I'm watching Logan Paul.