The act of forcing all of your penis into the women's vagina in one powerful thrust.
Jack: Yo Matt, how was Chelsea last night?

Matt: Dude, it was awesome, I clam packed her at least 10 times!
by Matthew Paglia September 30, 2011
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the scientific name for a car or large group comprised of only women
Dude, look at that girl in that clam pack! Her smile is beautiful
by aucuparia December 22, 2016
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