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Someone who hides (or 'packs') things in their vagina. Also used as an insult if someone has a huge, loose vagina and could fit a lot of objects inside.
Guy 1: That slags slept with so many guys
Guy 2: What a muffpacker!

You can be the muffpacker, your job is to hide this gun...
by muffpacker#1 May 05, 2011
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