To remove all Christmas decorations after the holidays are over.
It's April, and my lazy neighbors still have their Santas and nativity scenes in their yard. It's time for them to dechristmatize. That looks trashy.
by anonymous December 26, 2004
1 more definition
Packing away all of your Christmas decorations for the year, therefore getting your house back to normal.
"I had to DeChristmatize early this year because I had no more room left"
by Sara H.sd. December 29, 2008