rockstar
Someone who can stay up and party all night long and then wake up and take care of business in the morning.
Example:
Dude, I was partying HARD until four in the morning but showered and went to work for an eight o'clock meeting - cause I'm a rockstar.
Dude, I was partying HARD until four in the morning but showered and went to work for an eight o'clock meeting - cause I'm a rockstar.