Top Definition
To make something more christmasy. Usually by adding christmas related objects such as a christmas tree, christmas lights, or other ornaments.
Person #1: Want to come help me decemberify my house?

Person #2: What dude?

Person #1: You know decemberify?

Person #2: No

Person #1: LOL, it means to decorate it with christmas stuff so it looks more christmasy!

Person #2: Awesome
by ILoveDomo:D November 28, 2011

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