a person who snacks a lot, eats fast and sloppy, or snacks on other peoples things on a regular basis. "snacky bitch" can also more generally apply to a fat person.
that snacky bitch ate the last soft taco.

slow down on that pad thai, you're being a snacky bitch.

did you bring emergency potato chips? you snacky bitch.
by jay-emm-bee June 8, 2011
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