A person, most commonly female, who is or was a Russian national that has resided in numerous countries to attain numerous citizenship papers, work visas, passports, education, and has a framework of identities, which could even include people for assisting in manipulating the mindset of others over the long-term, to achieve a goal to eventually marry (and possibly divorce) for devious reasons, most likely financial.
Joe: "My Russian neighbor's Americangirlfriend introduced me to this beautiful woman from the UK. She's from London, England and just moved to New York. Her name is Ann Chapman has a Russian accent, well educated, and has been all over the world! I think I want to marry her."
Ivan: "Are you sure she's not a Russian Nesting Doll waiting for someone like you to come along to operate under a new name, get a new passport, citizenship, and to sell off all her old documents to the next girl in line back in Russia?"
The act of covering a toilet seat with two layers of toilet paper, because some douche bag left a fucking turd on the toilet seat at work, and there's no way I'm sitting on that fucking thing with only one layer of toilet paper.
Yo, can you toss me in some more toilet paper? I'm double nesting this bitch because big kev took another shit.