The holy grail of labial proportion. One that has been cooked al dente that makes you want to jump in head first and eat until you're satisfied. Its proportions follow the natural patterns of the Fibonacci Sequence.
Michelangelo was regaling his tale when he was graced in the presence of the holy grail of vaginal slits; it was the fettuccine-sized slit of April O'Neil. When asked by Leonardo if it was prepared to ephemeral perfection, Michelangelo simply replied, "Al dente."
Fettuccine is another adjective for making money. Due to its high value ingredients that are often spoken highly by rappers, (Pasta, Mayo, Chicken, etc...) fettuccine is describing your riches beyond belief.
Daeshawn: "Dam son where'd you get all that money from?"
Tyrone: "C'mon son. You know I been fettuccine chefin on the low."
This occurs when you are getting your dick sucked by a female while you are uncircumcised. While she is sucking your dick she throws up and her throw up goes underneath your foreskin. When you pull your foreskin back to clean it you see a creamy substance. This creamy substance is both smegma and throw up.
Oh my god bro, I was getting head from Olivia yesterday and I ended up getting fettuccine foreskin.