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1.
n. Several. More than expected. Usually used for comic effect when viewing a friend's accumulation of bongs, cigars, skateboards, nipples etc.

......................................................................................
Hey bro! Check out all these buds man.

Dude! Looks like you bought the family pack.
by gnostic1 September 01, 2012
 
2.
When a women gets knocked up and gains a baby bump. Kind of like a six pack in the sense that it develops over ones tummy. Typically used when referring to a women pregnant with twins or more.
Shit man... The prophylactic broke and... Well Sherry is going to have a Family Pack.
by Darcy Chumang September 22, 2008