Clark Griswold 

Taken from the National Lampoon Christmas Vacation movie.

(Noun) - Someone who gets possessed by the Christmas Spirit and enjoys it a little too much

(Verb) - its the act of getting way too into Christmas, including decorating your house in an obscenely obnoxious way or traveling out to the middle of no-where to cut down an oversized Christmas tree.

John realized he went Clark Griswold on his house when he could see the lights from across town.

Clark Griswold by mildmanneredclarkkent December 1, 2009

Clark Griswold-ing it 

When someone has the parks far back in a parking lot, even when there are plenty of spaces available closer; When one fails to realize that the person whom they are trying to yell for is right behind them; overabundance of christmas lights.

Dude! Why are you Clark Griswold-ing it?!?!?!?! There are plenty of spaces closer to the door!!

Well... Looks like the Smith's Clark Griswold-ed their house for Christmas again!!

Clark Griswold-ing it by Just_Kidding December 5, 2012