Someone who has had sex with so many people that they are virtually guaranteed to have multiple STD's. Similar to a walking STD.
Me: "Pat and John are walking petri dishes."

Jane: "I know, they're total male sluts."
by PennieGirl July 21, 2005
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Analisia Marie Petry, a very pretty but insecure girl who normally hates her friends but loves her real friends and of corse her boyfriend <3
Analisia Marie Petry is a very hot beautiful girl but she jus has to be taken
by Analisia September 28, 2021
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used to call someone flat and with no booty
shut up Panckakes Guy you petri dish, you have no booty.
by IAmChickenBot December 12, 2019
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Someone who gets the Covid-19 vaccine.

According to genetic research, the number of genetic variants of the Sars-Cov-2 virus has increased from eight possible variants before the vaccine started to be administered in December 2020 to over 400,000,000 possible genetic variants by August 2021. This information is not relayed to the public, but is easily obtainable by the general public.

The variants are mutating in the bodies of vaccinated patients as the Sars-Cov-2 virus seeks to mutate and overcome the artificial antibody resistance in its hosts. This has huge health ramifications for all people as no amount to research will be able to keep pace with effective treatments. The worst is yet to come.
Richard is fucked. He got the Moderna vaccine and a booster. He's a Walking Petri Dish now and is proliferating the unstoppable spread of Covid-19 in the name of short term convenience. Fuck him, I'm heading to my bunker with my Ivermectin.
by viraltruths September 9, 2021
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When a girl has fucked everyone and you don’t know what kind of shit you’re gonna get on your dick!
Damn watch out Shannon’s got that petri dish vagina
by NotAGomer October 3, 2017
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A. someone who continuously sticks needles into their skin: medically and heroinically.

B. someone who allows experiments on themselves.
"That guy must be a human petri dish, son of a bitch has moss growing on his face."
by SnargleFargle December 5, 2011
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