look up any word, like crust punk:
 
1.
the definition is split in to two parts
zero: being a loser, someone with no aspirations or goals
hero: being amazing person who does what they please and makes people want to be them; the ultimate in someone being an all around great person
Wow that boy went from zero to hero in a matter of minutes!
by miss vikk November 24, 2009
 
2.
(Adj) Pertaining to the wanton sexual act of being penetrated anally without any preceding vaginal penetration or foreplay.
"She was wild; she even wanted to go Zero-to-hero."
by Poppy Seedy January 15, 2012