4/30/1945 is the death date of Adolf Hitler when he committed suicide by shooting himself in the head while simultaneously biting into a cyanide capsule.
Fred: "Hey bob why are you wearing all black today?"
Bob: "It's 4/30, the worst day in history, the day Hitler died..."
by Herr Wolf April 5, 2008
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to replace the typical work day nooner where you and a co-worker make passionate love in the store room closet.
If you miss your nooner, there is always a dirty 4:30.
Dac took Alana into the back for a Dirty 4:30 while Jay watched.

I just had a dirty 4:30 in Alana's mouth.
by Dalana September 3, 2009
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Needing to take a large dump usually after work or school at around 4:30
I haven't had my 4:30 meeting today, I am about to dump in sexy dance fighting!
by Bobs Burgers November 15, 2014
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The time that the legendary Twitch Streamer Devi15demise streams daily.
Oh damn, it’s time to watch the 4:30 stream!
by Broc Lee October 2, 2020
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When 4:20 hits you so hard you gotta restart.
Damn m8 you might wanna 4:30 it up !!!!
by Call.me.Gay March 14, 2017
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The state of experiencing feelings that you can’t quite explain. Strictly only used in the presence of other close broskis.
What’s up bro you look out of it?”
Sorry I’m just getting major 4:30 vibes right now.”
by Sad dinosaur2725 December 3, 2018
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A worldwide time to smoke marijuana, only known in some areas.
See yo at da 4:30 tonight brotha
by Billy Bob Joe Brown III September 5, 2006
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