Stinky
Kid
Chipmunk (usually after teasing them about how they eat)
Shorty
Skinny
Tubby (Just kidding about that one)
Ditz or Ditzy
If you follow behind her in a store, tell her you can smell her. When she asks what she smells like, think of something crazy and then call her that. She will love it. It should be something outlandish like plastic, rubber tire, engine oil, etc. Shock value is important. She knows full well you are teasing but you are showing imagination (or a propensity to be like Atom Smasher). Either one is universally recognized as good form.
Baby Girl, Baby Cakes, etc. when you want to endear yourself to her
Spaz
Cranky
Spanky
Noodlehead
Snickerdoodle
Creepy
Just as bilbo says, you need to tease her about things and when she responds stongly by fake punching you and the like, use a nickname that fits the tease. Don't over-do it, though. It's just like ****y/Funny. It's a tool be used with discretion. But
use it, all the same. It is effective for many uses.
Edit:
Htienvu said:
I read on SS article somewhere that tell them you have a nickname for them, get them curious. Laugh when you tell her, she will want to know what it is but you NEVER tell her what it is. It's a good way to tease them, I tried it once, it works well.
I use this too. It's a very good thing to get their curiosity up and keep it there.
Dang it, will someone please PM me about how to multiple quote? I think I'm using way too many steps to do it.