<human>: Condense the text into a few key points

This technically started before the holidays, but I just learned of my fuck up today...  

Boss is a big fan of McDonald's breakfast.  At least three times a week she brings in a bag and a Coke.  And it HAS TO BE COKE!  I've heard plenty of griping about when they give her a Diet Coke or Dr. Pepper by mistake.

I thought it would be cute to get her a McDonald's gift card and write "FOR COKE ONLY" on it.  I know - I know - I'm the bestest.

Anyhow, went to one of our local McDonald's, got myself some food and asked for a $20 gift card at the drive thru.  Total wasn't correct on the screen, was told "we'll get that at the window."  Paid cash (stupid) and didn't check the receipt after handing over cash (double stupid).  Hell, I didn't even register the fact that the drive thru employee looked confused as to why I was asking for the gift card...  All that "faith in humanity" BS biting me in the ass again I guess.

Fast forward a couple of weeks to this morning.  In management meeting.  As it ends, boss says, "Chumley_Wonderbar_, I hate to look a gift horse in the mouth, but I tried to use this card and it didn't work" while handing me back the gift card.  In front of other management folks.  Ugh.  Now everyone thinks I'm an incompetent kiss-ass who makes lame jokes about Coke.
<bot>: Bought boss a McD's gift card that wasn't activated properly; got shamed for it in front of coworkers who now think I'm a ass-kissing moron.