December is the month where you apply your hands in a slapping action to any penis (male or female) you may encounter.
Terry: “do you have a dick”
Todd: “yeah?”
Terry: *slaps Todd’s dick*
Todd: “Why’d you do that?”
Terry: “It’s slap dick December”
Todd: “yeah?”
Terry: *slaps Todd’s dick*
Todd: “Why’d you do that?”
Terry: “It’s slap dick December”
by Dicksucker96 October 18, 2019
Get the Slap Dick Decembermug. omg who dropped their hotdog?
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by fuckitimgoingtohell September 24, 2021
Get the what the frick frack dick slap pussy ass buttcrack lackback stupidass cupid last cast best ass less bass is this stupid shitmug. by Rando dud who luvs gemma October 28, 2018
Get the ur mockin me arnt you *slaps dick*mug. 
In other words, Fuck You, Suck my dick. Another way of telling somebody to get they whack ass on somewhere .
by Slapdickanddie February 20, 2021
Get the Slap Dickmug. by 4am cock slap September 27, 2019
Get the 4 am dick slapmug. by §atori.exe May 24, 2021
Get the DICK SLAPmug.