This is when your grandad comes into your room when your sleeping and wanks over you. It is typically done at Christmas because he can blame Santa as he has white hair and a beard. It often wakes the sleeping person up but if this happens just say "Ho Ho Ho! Merry Christmas". then deposit the 'gifts' from your sack and leave.
Grandad/old man walks into room and starts

wanking over someone.
Sam - " what are you doing here, you woke me up, you twat"
Jimmy - " Don't mind me, I'm just santa dropping of my presents from Santa's special sack."
Sam - "Why am I so sticky!!"
Jimmy - *whispers* "Oh shit I need to leave"
Jimmy - "Ho Ho Ho! Merry Christmas"
by John Is Twat December 3, 2020
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The act of perfoming oral sex on an unshaved, hairy, hippie woman who hasn't showered in a week because she is natural.
Tom felt sick after a Santa Cruz Sack Lunch with that UCSC girl.
by datymade me sick June 5, 2011
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Preferably done around Christmas time. You go out and find a virgin, pop her cherry, and then paint your sack with her blood.
Hey Tom, this chick let me do Santa's Big Red Sack with her last night. It was awesome.
by JayTree January 18, 2008
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When you dress up in a Santa costume and go balls deep in a girl
I gave my Ho! Ho! Ho! Santa's Sack last night
by Biggius Dickus January 20, 2020
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The act of dropping your balls on your girl in the snow during Christmas Time.
Where is Tim and Jess?

Oh, they're out back santa sacking!
by Jimjohns5 February 26, 2023
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