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rsa

RSA is a public key encryption algorithm invented in 1978 by Ron Rivest, Adi Shamir, and Leonard Adleman; and so is named after them.

Text or data is encrypted with one numeric key (or password) and decrypted with another. The person intending to receive the data generates a public and private key. The public key is shared with the sender (and anyone else who may intercept it), and the private key is kept secret with the receiver. Anyone may encrypt data with the public key, but only the private key may decrypt it.
(RSA can be used to secure communication over public channels without ever meeting the person you're speaking with.)
by Raccoon January 6, 2006
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RSA

Rub Some Ass; when two people face opposite ways and rub their buttocks together bare ass
Frank and Laird did some RSA the other night.
by Schoff November 22, 2014
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RSA

Can mean ritualistic sexual abuse. An acronym often seen along with other sa (sexual abuse) acronyms such as csa (child sexual abuse) and others. Refers to sex abuse usually to children, in which their is a ritualistic component, often religious.
I was raised in a religious cult and was a victim of rsa, adults in the cult would engage in sex acts with the children because they believed it was gods will.
by Gharish3759 November 15, 2022
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RSA

literally translates to Random Shark Attack.
It is an unnatural occurance that happens when Spock becomes bored and decides to teleport sharks into random places. The sharks are usually engaged in the hunting of their favored prey, the spongebobs. Usually the sharks are safely transported away if no water is immediately available.

Happens most often on Facebook.
Dorris: "So I told her to take that book and shove it up her-"
Tom: "RSA!" -giant shark proceeds to eat Dorris

Carol: via facebook chat "Hiya Susan!"
Susan: "RSA! (^^^)" -and again a shark-
by MVirus May 24, 2010
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RSA

RSA – Rear Seat Accessory – A member of the opposite gender, usually decorative in nature, that occupies the passenger’s portion of a motorcycle seat.
I’m looking for a new R.S.A.
or
My biker friend lost his RSA the other day when it fell off; I'm helping him find a new one.
by tall_dave_1959 October 13, 2009
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No DNA. Just RSA

(South African) expression of patriotism, to be South African descent
My doctor checked the results, it said no DNA. Just RSA
by Dental Curry October 20, 2025
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