Among musicians, especially rock musicians, "Rock Star" is the ultimate putdown/insult. It means 'prima donna.'
Tommy Lee (to Vince Neil): "Dude, you are such a rock star!"
Vince Neil: I AM NOT A ROCK STAR!!! (as he throws down his microphone and stomps offstage in a fit of pique).
The Urban Dictionary Mug
One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.
Buy the mug