I was in the kitchen, getting ready to make myself a cup of coffee and used the last of my creamer and open the new bottle I'd brought.  I label the tops C.D. as I am the only person in our department to have those initials. 

As I'm washing out my cup she is rummaging through the mini fridge trying to fit her fat ass cup inside and pulling stuff out.  She pulls out my old bottle, which has just about enough creamer for the cup of coffee I'm about to pour.  She goes to the gal who sits close to the kitchen, shaking the bottle saying "C.D. who is this, it's empty, I'm going to throw it away" 

I reply "That's mine.  My initials are C.D. - Cubicle Dweller.  There is enough for the cup of coffee I'm about to pour"

She then looks at me and shakes it with this look that says "No there isn't" when you can totally hear liquid sloshing around. 

So I snatch it from her and say softly to myself "It doesn't take a genius to figure out who C.D. is"

She overhears and says idiotically "Well, it could have been Candy Federick"

So I snap "That's C.F. this obviously says C.D. as in Cubicle Dweller" 

She just kind of waddled off.