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Archimedes' Principle of Watermelons 

Archimedes' Principle of watermelons states that any watermelon juice which is absorbed by a marshmallow will make the marshmallow heavier and wetter and better tasting.

Modernly made famous by Tom Willett in his tutorial on how to eat a Watermelon.
Bob:"Can you explain Archimedes' Principle of Watermelons to me, Tom Willett?"
Tom:"When you combine a marshmallow and watermelon, and you spoon it around in the juices of watermelon and then you take it out you will notice that the marshmallow has taken on some of the properties of the watermelon; it is more pinkish-redish in appearance, and wetter."
Bob:"Thanks! I finally understand it."
Rough sex resulting into backache and an itchy vagina
She got Achimmed really hard last night.

You've been Achieved!
Achimmed by TheGreatAchimmer March 2, 2018

archimedes 

He has the sex, unlike all you lame ass weirdos who only have regular sex. Maybe if you got rid of that yee yee ass haircut, you'd get some bitches on your dick
Archimedes is the only one who ever

archimedes screw 

A pump consisting of a screw within a cylinder. When the screw is turned, water is moved from one end to the other.

-- or --

When Archimedes has sex with his wife.

-- or --

When you yell 'eureka' upon ejaculating.

-- or --

An ancient invention that can be used in the vagina to evacuate excess menses.
In an incredibly archane reference to an ancient invention, a sexual double entendre is achieved.
archimedes screw by scorpionmintred November 19, 2004

Archimedes 

A guy that is hot, and knows how to treat a girl.

Super Awesome! Also, it's the greek guy who invented the Archimedes Screw.
Man my boyfriend is a total dick, i wish he could be like an Archimedes.
Archimedes by Blah ;) May 9, 2010

Archimedes 

a bird that belongs to medic. He likes weed and nesting in open chest cavities. His best friend is pootis and spycrab. He responds to "ARCHIMEDES NO" and sometimes likes to fix daddy's feathers.
Medic:ARCHIMEDES NO
Archimedes:*eats weed*
Archimedes by raybeez February 25, 2022
More from Urban Dictionary

Soul digger

A man who dates women with the sole purpose of exploiting their time, energy, and labor while he sucks the joy and happiness from their lives.
"That guy's a soul digger. He'll expect you to work full time, but you'll be doing all the cooking, cleaning, laundry, shopping, and childcare while he plays video games or watches TV."
Soul digger by anonymous November 11, 2026
Word of the Day on November 11, 2026

pod person 

A person pretending to be something they aren't, or an impostor. This is inferred because of the old alien movies where alien pods appear on earth and the "pod people" dispose of the humans and slowly reproduce the bodies, pretending to be humans.
The pod person was pretending to be my father, but I knew that he was an alien when he acted differently than my father ever would have.
pod person by Christopher M. May 9, 2005
Word of the Day on November 10, 2026
A dead drop is a location used to secretly pass items between two people, without requiring them to meet.

Spies have been known to use dead drops, using various techniques to hide the items and to signal that the drop has been made. Drug dealers use this as well.

A common place is to duct tape the item to the underside of a toilet cover in a public restroom.

A signal is sometimes used as well to indicate there is something to pickup, like a pile of stones in a certain formation. After checking the drop the signal is removed.
"The dead drop is the restroom toilet at the Gulf station at the corner of Commercial Ave. and Georges Rd."
dead drop by rubberroom July 23, 2008
Word of the Day on November 9, 2026

No Surprises Wedding

A "No Surprises Wedding," or NSW, is a wedding invitation designation that tells attendees that there can be no unplanned announcements, engagements, events or speeches at the wedding - all actions must be pre-approved by the couple. Anyone who performs an unapproved "surprise" will be asked to leave the wedding early.

This designation comes from Reddit, where so many stories of bad wedding behavior indicated a need to communicate expectations for the wedding behavior of attendees.
You are cordially invited to the nuptials of Brian and Tom on October 31 at noon.

Please note that this wedding is child-free (under 10) and a No Surprises Wedding (NSW). Reach out to wedding planner Sami Smith to request approvals or exceptions; please note that exceptions will be rare. Limited child care for under-10s will be available. All approvals will be noted and included in planning. Unapproved, or surprise exceptions, will result in guests being asked to leave.
Word of the Day on November 8, 2026
Ulzzang true definition is "best & "face" = best face in korean. They are basically people with above average looks, sometimes with the use of photoshop and haduri who post their pics online, some becoming internet celebrities.
"Hey, see that chick over there? She's pretty enough to be an ulzzang. :D"
ulzzang by `r i k kit t y February 26, 2008
Word of the Day on November 7, 2026
EBK stands for "Elite Ball Knowledge." 1 In internet slang, "ball knowledge" originally referred to a deep understanding of football/soccer or basketball, but it has evolved into a broader term for having a highly sophisticated, deep, or niche understanding of any specific topic (such as music, movies, or subcultures).
Person A: "That scene was a direct homage to an unreleased 1982 Japanese indie film."
Person B: "Wow, EBK."
EBK by silwhett November 5, 2026
Word of the Day on November 6, 2026
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