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The point where a girl is SO wet that her wetness is comparable to Niagara Falls.
Mitch: Dude I just preformed a magic trick for that girl over there.
Nick: She must be so niagina right now!
Niagina by Cock-a-hoop August 20, 2016

Niagara Titties 

The condition that occurs when a woman belly extends past her flapjack boobs. The boobs then appear to be cascading over the belly like water over Niagara Falls.
Damn, Did you see that bitch's Niagara titties spill all over the place.

Niagara Balls 

The point at which your testicals are so sweaty they could function as a water feature.
Wow Bills so sweaty he must have Niagara Balls.
Niagara Balls by JaD August 3, 2018

niagara falls impression 

when one throws-up. Prone to happen after pregaming with appletinis.

Phrase originated in a Boston pizza in Niagara Falls, ON.
Jeremy is such a toolbox, he did his niagara falls impression all over Boston Pizza, ruining all his single friends chances with those ladies.

(Text): Ass-clown wake up for class! or are you too tired from showing everyone your niagara falls impression last night?

niagara falls 

Niagara falls is an odd city. That's right, it is a city. Everyone knows Niagara Falls for the waterfall but very few know the true Niagara Falls. First of all there are 2 cities. There is Niagara Falls, New York, and Niagara Falls, Ontario, (In Canada).

Now back in the prime of Niagara Falls, New York we had a population of about 100,000 people or more, people can't agree on the exact size but it was a decent sized city. Niagara Falls, New York was just like other rust belt city, its economy was based on Chemical Plants, and Industrial Plants. As the industry left, poverty and crime went up.

On the other hand, Niagara Falls, Ontario managed to keep most of it's industry, and now it is focusing on tourism by using casinos. The Niagara Falls, Canada skyline is getting bigger and bigger each year. The Niagara Falls, Ontario skyline now rivals big American cities.

Niagara Falls, New York was run into the ground by corrupt, and mentally retarded politicians. Now it is a crime ridden slum. Not only that but in order to boost tourism the local politicians have prevented the news media from talking about the rise in violent crime.

So basically you have 2 different cites on each side of a waterfall. You have a vibrant and growing city on the Canadian side, and the American side is struggling to catch up with it's Canadian twin,

Niagara Falls, New York has turned into a small version of Gary, Indiana.
Tourist: Oh Reginald, I love Niagara Falls lets go to this lovely little shop called a ...liquor store?

Mugger: Give me your money bitch!

Tourist: Oh Reginald this town is so dirty, my goodness, this man is wearing a trash bag.

Mugger: Bitch! Don't talk shit about the bag, just give me the money.

(Mugger Stabs tourist)
niagara falls by Dr Funky September 4, 2008

Niagara Falls Syndrome 

When a girl does something or sees something that makes her vagina get extremely wet
Chris: Madi, why do you look like you peed your pants?

Madi: Well you walked into the room and I got Niagara Falls Syndrome!

Chris: That happens all the time!
Niagara Falls Syndrome by Mizfku December 16, 2010
More from Urban Dictionary

Pee Calculus

When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.
Pee Calculus by anorlondo October 1, 2026
Word of the Day on October 2, 2026
Literally "dirty" pronounced with a West Indian accent. Can also have a positive connotation, for example Sean Paul's album title "Dutty Rock".
"The girl is pretty but she corrupt and dutty!"

or, in a positive usage:

"Booya! That freestyle was dutty!"
Dutty by J Hall April 3, 2003
Word of the Day on October 1, 2026
korean word for madam, older woman
Ajumma wait a moment
Ajumma by aintnotinbutnice July 5, 2009
Word of the Day on September 30, 2026

Slop Grenade

When someone uses AI to generate a large document, slide deck, or piece of code/software and tosses it over the fence for you to deal with.
Chad: Hey Brent I sent you the new backend API change to review, it’s only 100 files changed.

Brent: he just tossed me a slop grenade
Slop Grenade by Joe Squid September 28, 2026
Word of the Day on September 29, 2026
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).
After we broke up, he was floxi to me.
floxi by Dr. Geek May 13, 2009
Word of the Day on September 28, 2026
NYC people who migrate north to Quahog, RI to see the leaves in the fall.
New York and everyone from there can fornicate themselves with an iron stick.
leafers by ss++ February 8, 2005
Word of the Day on September 27, 2026

Respectfully 

Precedes or follows either a gratuitously disrespectful or honest remark, originated in New York City. Used in similar fashion to "no offense" or "to be honest," interchangeably.
Ya mans is wild buns, respectfully. Respectfully he's washed.

After school, The Modells on Jamaica Ave was active. Respectfully.
Respectfully by john quan the first December 20, 2020
Word of the Day on September 26, 2026
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