I named my husband's bikes for him:
The Cannondale (his roadie). I also have a Cannondale but since his took the name I call mine Miranda. 
The Stumpy or just Stumpy. His Specialized Stumpjumper FSR.
Jake or The Kona. His Kona Jake Cyclocross bike.
When talking about my bikes to people I call them "my Cannondale", "the Fisher" or "my hardtail". Like they will just follow along with that.
Amanda
2011 Specialized Epic Comp 29er | Specialized Phenom | "Marie Laveau"
2007 Cannondale Synapse Carbon Road | Selle Italia Lady Gel Flow | "Miranda"
You don't have to be great to get started, but you do have to get started to be great. -Lee J. Colan