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An onsen is a Japanese style public bath using volcanically heated hot water from the ground.

The term onsen is often used in the Japanese language in reference to the bathing facilities surrounding hot springs.

Onsen, when translated into English means 'hot spring', which can lead to confusion and miscommunication.
After watching the monkeys in the hot spring, do you want to go to an onsen?
Onsen by 7 years in August 20, 2013
Related Words
Onset • Onsel • onse • Onseener • Onsefulofenia • onseminate • Onsen • Onsene • onsera • onserio

Sudden Onset Autism 

Sudden Onset Autism, or S.O.A for short, is an extremely rare condition of unknown origin. Development of this disease is both abrupt and severe. As of now, the pathogenesis and mode of infection have eluded even the most qualified of research teams at Harvard, Hopkins, and Yale. Some have suspected that transmission occurs through contact with an infected person, especially prandially. There is still hope for a cure, although we may be decades away.
Infected Person: Hey man, let's go grab some lunch
Healthy Individual: what?! It's 3 in the morning. What's wrong with you
Infected Person: Well... it's lunchtime somewhere!
Healthy Individual: Oh God, you have Sudden Onset Autism... Please go away from me!

Early onset necrophilia 

When the elderly have sex, pushing apart a grilled cheese sandwich with a loose sausage you found in the back of the freezer.
I walked into great aunt Bessie's room and her and uncle Boris were going at it, 19 to the dozen. The doctor said it's 'early onset necrophilia' and prescribed me some eye bleach.

Early Onset Caucasia 

Mental Illness found in white women aka“Karen“ worsens with age.

Symptoms include/not limited to Attacking others then playing victim when authority arrives. Knowing you're deadass wrong, STILL want a manager. Calls 911 on anyone doing anything, while black. Use police as threat to harm, not service to help, denys police brutality. Theft of music, machinery, property, wealth, ideas... literally ALL OF THE THINGS IN ALL OF THE PLACES.

Know causes include /not limited to, insatiable thirst for chocolate, Only have a tiny vanilla, raisins in potato salad, thinking Jesus was white, short strokes, lack of exercise or results, specifically doing squats.

Cures- Hennessey, Atlanta, swap paprika for Lawrys, vitD super veggies resembles eggplant in size &girth. That D taken orally, anally, vaginally & swallow juice or use as facial (can’t take too good of care of that skin!) Start by using only 1D at a time but the only snitch here, is you!

NOTE: Seeking medical advice is NOT recommended as it will trigger EOC fits due to the Doctors sudden disregard for your well-being.

FUN FACT- EOC is unique because those without it, suffer from it the most.

- Becky Snow
Knowing she was at risk of contracting EARLY ONSET CAUCASIA, Amber got divorced, moved to Atlanta, vaguely remembers drinking Hennessey, is making a conscious effort to regularly consume her veggies and is no longer at risk of contracting this horrific illness.

on se casse 

It means in French, let's leave. Se casser in French really means to break. But in slang, se casser means to leave. On is a familiar way of saying, We. Thus: Let us (we) leave. The se is a grammatical word and this is not a French lesson so let us leave it at that.
Cette boum est morte, on se casse!
This party is dead, let's leave!
This party is dead, let's get the hell out of here.

Voilà la police, on se casse!
There is the police, let's get the hell out of here!
on se casse by monsieur screech August 2, 2007

adult onset downs (A.O.D.) 

a gradual transition into the realms of trisomy 21 usually occuring after adolesence
symptoms include:
a gradual lowering of the i.q.
tounge lolling
compulsive masturbation
"Lily is getting dumber by the second, maybe she has adult onset downs (A.O.D.)"
More from Urban Dictionary
Millennial optimism may be gone, but Gen Z whimsy (WhimZ) is in.
WhimZ by WhimZ! November 5, 2026
Word of the Day on November 13, 2026

Frothability 

The measure of an emotional and over zealous consumer in an upwardly charging market, also known as a bull market. It's characterized by rising asset prices, increased investor confidence, and favorable growth in the markets, bro.
The frothability was evident as over-zealous consumers eagerly engaged in bidding wars, driving property prices to unsustainable levels reminiscent of previous speculative bubbles.
Frothability by cptn.kagaroo1 January 26, 2024
Word of the Day on November 12, 2026

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
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