Used it at work!

[Shakira]

Quick BG:  My office is way understaffed, and overtime is always available, but never required. I usually work about 4-5 hours of overtime a week.  Recently, I've cut back on my overtime because DH and I just bought our first house ( ) and so have been busy unpacking, painting, doing yardwork, etc.

This conversation took place yesterday:
PIC (person in charge, but not a supervisor in any way)

PIC: So MrsCP, are you coming in to work tomorrow? I need to know who all can make it in.
MCP: I'm afraid that won't be possible, I have plans.
PIC: Well what are you doing?
MCP: DH and I are doing some yardwork since it's so nice out.
PIC: Oh, come on, you slacker! Work tomorrow! You can do both!
MCP: That's an interesting assumption.

At which point I conveniently needed to go to the fax machine on the other side of the room to "check something".

So glad Ehell has taught me this phrase. 

[Fleur-de-Lis]

The conversation should have ended at "I have plans."

PIC had no business prying into those plans, and should be reported for calling you a slacker. Something like that should be in PICs personnel file in the event PIC is ever considered for a supervisory position.

[Mental Magpie]

First you "that-won't-be-possible"-ed.
Then you "interesting-assumption"-ed.
Then you bean dipped!

I'd say you handled it pretty thoroughly    Well done.