The act of ejaculating over another or one's own face- specifically carried out over the Christmas period.

See also-

A tissue featuring images of animals in novelty Christmas dress up – usually carried around in clear plastic packets by old people or east end hipsters.
“I gave her a Christmas tissue in the face….right it in.”

“He didn’t appreciate the Christmas tissue.”

“A Christmas tissue isn’t for life. It’s just for Christmas.”
by Lady bruncher January 21, 2014
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