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1.
(n) an individual who believes in giving the latest silicon gifts at Christmas time.

Traditionally this refers to more technological gifts such as computer games and iPods, but recently the term has come to refer to the practice of giving plastic surgery as a Christmas present.
"Only that silicon santa Joe would think of getting his girlfriend a boob job for Christmas."
"I'm so jealous of Sandy! Do you know how many silicon santa presents she found under the tree this year?"
"Silicon santa made my Christmas wish come true."
by jersee December 07, 2010