Oonse 

The sound of 90s dance clubs.

Oonse oonse oonse oonse oonse oonse oonse...

Oonse by Night_Electric July 22, 2012

Oonse 

the noise produced when imitating a sexual act when paired energetic pelvic thrusts.

Mim- are you going off to get some sex??
Kirsten-.....oonse oonse oonse oonse ;)

Mim- I could hear you 'oonsing' all night last night!

Oonse by Kdub.M.rose May 20, 2011

Onsen 

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

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!

Sudden Onset Autism by burner90 May 14, 2018

onosecond 

The horrible moment when you realise that you have accidentally done something very slightly wrong which has very bad (usually embarassing) implications for you. This is typically the moment of realisation that you just sent a dirty text message to a close member of family, typically your mother, rather than the intended recipient.

Message: "i'm free this afternoon so come over and fuck me senseless, my parents will be out all day"
Recipient: Mum
Message Sent
- Onosecond occurs here -

onosecond by Jimmed September 26, 2006

OOSE! 

When you whip out the hand when playing the circle game

Yo! Look at my tims eh. OOSE!

OOSE! by GetOosed! July 11, 2023

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 necrophilia by Pork Almighty June 17, 2016