Kahootist
A kahootist is a self-important idiot who can’t handle losing. They’ll scream at you and throw things if they don’t win.
I beat my kahootist friend and he screamed at me and threw his phone at me.
My kahootist brother threw his pencil at me because I beat him.
My kahootist classmate screamed, 'You’re not even smart,' and threw his notebook at me.