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BSL-4

A laboratory that contains the deadliest viruses known to mankind. These viruses are Ebola, Marburg, Lassa, Hanta, Smallpox, Crimean hemorrhagic fever, Argentinean and Bolivian hemorrhagic fevers. So any disease that makes you bleed to death, you should wear a positive pressure suit not to catch it.
Walking into a BSL-4 lab without a space suit is basically a suicidal act.
by Gio Bandito February 25, 2015
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Throwing a 4

You pull no women and you love big muscular men
Dude did you see Brayden throwing a 4
by Cr30 April 15, 2022
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november 4

the day you slap all your taller friends.
omg, you’re tall, i’m going to slap you now! it’s november 4th
by babyy❤️ November 3, 2019
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4 service

4 service is catering company with toothless waiters sourced from a mining company in russia. they make omelets while washing the rooms. reception staff drink vodka and sing Christmas songs while watching violent porn on the pc screen, impossible and get in touch with them. and if you get in touch with them then they try and have sex with you and steal your money. If you complain about the rooms, a black limousine with 3 anabolic guys will come and ask you to shut up.
by Kripos October 19, 2021
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Person 4

why would you use a person 4
Person 1: hi
Person 2: hello
Person 3: why is nobody caring about m-
*person 1 and 2 beats up person 3 for interrupting a talk about their own crap*
Person 4: why is everyone forgetting about me.
by WHAT IS THSI February 17, 2021
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article 4

When someone is actung like they have down syndrome, autism, and anger issues. Origin, from the Minies Constitution to call out DasB00t16 who acts as if he has these symptoms.
you’re fucking stupid, article 4 moment
article 4 dumbass
by FreshLilOuOu January 4, 2022
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November 4

4 november is the Day of the yeah the sexiest person was born.
Friend -Oh my god she was hot!
Me - yeah she’s born on november 4

Friend - oh that explains it
by Vsco girl. And i oop- sksksks. October 29, 2019
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