A person who buys groceries based exclusively on their country of origin.
Overheard on the train:

Guy: I only ever buy 'Australian' Oranges and always check cookies packaging.

Girl: Wow, I'm never that careful, there are so many traps.

Guy: Yeah, I'm a "Militant Shopper" like that.
by Maxwell Drive March 10, 2011
Get the Militant Shopper mug.