What a meth addict calls their special bag containing their meth pipe and methamphetamine. It's a reference to that special relationship that Gollum had with the one ring of power in The Lord of the Rings.
I'm not Meth'd-Up! Where's My Precious!
Don't look in the bag Josh!
I can't get pregnant... This baby is mine!
Carrie does not look like Gollum. Ok, well, maybe a little.
1. n., a synonym for the One Ring of Power forged by the Dark Lord Sauron in J.R.R. Tolkien's Lord of the Rings series of tales.
2. (var) "my precious"; an utterence which statest the presence of a possesed, supposed ownership of the One Ring; indicative of submission to the Ring's power.