J is for Who's a Jackanapes?

For J, I’m cheating. I’m reposting from a bloghop I used to be involved with, The Feather and the Rose's “Save a word Saturday”. I loved that weekly bloghop, but like with many blogging things, I had to cut back on it. I don't think it's going on anymore. So for the J in the A to Z Challenge, here’s “Who’s a Jackanapes?” 
Today's theme is: Unicorn
My word for today is: Jackanapes - 1400-1450, late Middle English; noun 1. an impertinent, presumptuous person, especially a young man; whippersnapper 2. an impudent, mischievous child 3. archaic. an ape or a monkey
And here's this week's writing:

"Jackanapes-jackanapes-jackanapes! Jack..a..napes! Ja..ack...an..apes! Jackanapes!" Simon jumped up and down on his rocking unicorn, his head bouncing along like a bobble head on speed.

"Simon, you're going to break your little neck, and you're driving me crazy! Cut it out. I'm sorry I called you that. It just slipped out. You are not a jackanapes. This is 2013 - that word no longer exists!"

Under her breath, Simon's mother muttered, "Oh, but the phrase holy terror is alive and well."

After a pause, Simon jumped off his unicorn and ran around the house crooning, "Holy terror, holy terror, ho...oly terrrrrooorrrr!!! 
pic from clipart.com