Mine is a nickname that I use for our girl kitty.
I call her "Toppers," because she is the "tops," or the best "top cat." 
She's 18 this year, and she's still feisty, and pretty spry for her age. She still loves to play.
So, she has different little nicknames out of this nickname, such as "Toppy Choppy," or "Tip Top," or whatever else I can come up with to call her out of that.
