the act of drinking a beer while taking a shower in the morning. because real rock stars don't give a fuck, they get drunk all day.
"dude, why does Ric have a shit ton of beer cans in his shower.."
"he takes rock star showers everyday man."
Washing your dick in the bathroom sink after sex.
A rock star shower is a quick and efficient way to get to sleep quickly and not have a stinky dick.