What Christmas turns into if you have sex before opening presents.

May also refer to the act of spending most of the 25th having sex.
"We celebrated Sexmas instead of giving gifts this year."

"I love Sexmas, it's the most wonderful time of the year."
by christmasguy071 December 24, 2009
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Awesome variable for the term "X-mas" which in turn is a bastardation of the winter holiday celebrating the birth of Christ, "Christmas". Not necessarily referring to a Christmas with sex.
Merry Sexmas And A Happy New Year!
by Joe August 25, 2004
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the very epitome of attractiveness.
A refined beauty, an alabaster vision ensconced in drapes of ethereal curtains of pure plasma sexiness
by shnoogywoobums July 28, 2009
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