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1.
The coming out party for celebrity vag. The first time cooter gets shown getting out of a limo.
Did you see Britney's dress the other night? Neither did I, all I saw was vag as she got out of the limo, she was right on time for her Cuntillion
by AlanHarper February 26, 2009
 
2.
1. The world's female population number
2. A nickname for the ever-gay high school dance, "Cotillion"
3. The amount of ass a virgin, teenage guy claims to have gotten in front of his annoying friends.
1. "Dude, don't worry, there's a cuntillion girls out there for you!"
2. "I went to Cuntillion, and it was so lame."
3. "Yeah dude, Oh I got about cuntillion bitches that night, it was tight."
by Zac LaC. April 02, 2006