A mental health problem which stems from jealousy invoked in music class.
When the same bitch is invariably granted use of the piano during musical practicals every lesson and you are once again lumbered with a piece of shit keyboard.
For the rest of the lessons, you struggle to hear your own keyboard due to faulty headphones or the keyboard's freakishly pathetic volume levels, all the while being able to hear the repetitive, untalented drone of the chosen pupil on the piano.
Guy #1: Steve got to use the piano AGAIN. WHEN IS IT GOING TO BE MY TURN?!
Guy #2: There are no turns, Steve gets it every lesson.
Guy #1: I am feeling SO much piano envy right now. I'm sick of these damn keyboards!