The one in which I am proven wrong

So every morning Braydon wakes up an and every car he has taken to bed with him must make the return trek downstairs for the day. Some times this means I am carrying Allyson, approximately 300 cars, a sippy cup, Winnie the Pooh etc, etc, etc.... One day this past week Braydon wanted to take so many cars downstairs I grabbed a bag and threw the cars in there to carry them downstairs (or downshares in Braydon speak). Braydon got very excited and exclaimed 'Packback, packback'....at first I was confused....then I figured it out 'Back pack?' I asked him. 'Yes mommy, packback'. OK, so we have learned a new word apparently! Yay for that. All day he was carrying things around, and no matter what he was carrying, he was calling it a 'packback', especially this basket that hangs around in our family room. He was carrying the basket over his arm or around his neck and saying 'look at my packback mommy'. So Braydon's daddy comes home and I figure we'll show him Braydon's new funny word.
Braydon was playing with the basket so I said 'What's that you're playing with Braydon? Is that your packback?' He looked at me and yelled, 'No mommy...BASKET!!!!'. Add in a teenager 'that is the stupidest thing you've ever said moooom' glare and yep, boy was I wrong....