a person who is always sick and spreads their germs where ever they are.
Alan is such a human petri dish. He always has a cold and sneezes all over the place.
by kajoe August 19, 2008
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A game where doctors in a fertility clinic jack off into a petri dish with an egg in it. The last one to shoot their load has to say that they are the dad.
Yeh, my mom told me last night that I was conceived in a game of soggy petri dish and my dad is some asshole called Dr. Carl Schiezner.
by SaxMan16 April 13, 2010
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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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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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