We always knew our boys name, but I still called him "porker" because he was such a big baby! Before we named our daughter Emilia we called her Bambina which, in Spanish, means "baby girl" and I love it! Of course, I didn't want it to be her formal name, but it's stuck as a nickname- so far!
I'm calling mine Tiny Toon (our last name is Toon).
For the 2 we didn't find out the gender, we called them "Mini Me" and "Quatro" (which was Vio since she was our 4th).
Our first pregnancy was jellybean, this one is peanut. But when people ask about the names we're going to use, we say whatever awful name comes to our mind first (usually Shatzy - his mom's name combined with my mom's name in a very displeasing way :)).
Hehe, what a cute thread! My first was Fowzi, a name my husbands niece who was 4 at the time got from a Turkish soap opera. Second was named before he was conceived. Third was O'Snarkey. My 3 year old made that one up. I have no idea where she got it!
I always thought I'd end up calling my kid something before they were born, but she never had a nickname...I just called her "the baby" the entire time.
My friends took to referring to her as random first names all the time. We didn't know if it was a boy or girl, so they were always calling and saying things like "How's Edwina doing?" or "I bought the cutest hat for Ernesto". We also got Marla, Hector, Penelope, Jemima...I don't remember the rest!