When you have sex with both the parent and their child on separate occasions.

Comes from Russian nesting dolls because the child came out of the parent.
Dude, you're totally russian nesting the Smiths.

Yeah man, I had sex with Stacy on Friday and then Stacy's mom on Saturday.
by TheBur April 25, 2017
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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 American girlfriend 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?"
by Username_00001 May 31, 2019
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when two men who are docking angle their penises upwards to allow a third man with a larger foreskin to dock over top. potential for an extra docker exists although further testing is required.
when attempting to perform a russian nesting dock it is essential to stretch first.
by Sterile Trout September 12, 2017
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When 3 or more men form a sex line. Creating a man inside a man, inside a man.
I ran into the Tucker at Urge last night. Me, him, and five other dudes did a Russian Nesting Doll in the bathroom. It was 'eh'.
by Thirtyfivecentwings November 12, 2010
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When your mom repeatedly hides stuff you use every day inside several decorative containers.
"Where is the ibuprofen ... why is it in here?! Stop Russian nesting dolling our whole house!"
by dietdrpete June 7, 2023
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