ground floor
The period in time when you begin dating or befriending an ugly duckling in high school or junior high school based on her potential to blossom into a hot piece of ass. When she does blossom, you will have an edge in a relationship with her because you were with her in her ugly years.
Example:
Tara would never have banged me as a senior, but since I got in on the "ground floor" and busted her hymen, she'll love me forever!
Tara would never have banged me as a senior, but since I got in on the "ground floor" and busted her hymen, she'll love me forever!