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Aggressively grinding each other while making out.
Abby was derfing so hard last night with him.
derfing by yunglivin September 1, 2019
Sex with clothes on
Cooper: hey Claudia wanna go derfing later?
Derfing by Derfingyurrrmom October 30, 2019

Dolphin Derfing

The act of dry humping with oscillations occurring rhythmically taking the form of the wigglings of a dolphin out of water.
Dude are you taking that Provo hair school chick out again? Yeah dude, if I play my cards right we’ll be dolphin derfing hard tonight.
Dolphin Derfing by Mondo Johnson April 16, 2019

derpling 

Someone who follows one who derps, while reciting that derp like dogma.
Dude, stop being a derpling and actually try to figure out stuff on your own!
derpling by smpier August 28, 2010

DeFlinginaw 

A combination of Michigan cities: Detroit, Flint, and Saginaw.
Hey NaStassja, where were are you from?
- I'm from DeFlinginaw, MI.
Where's that?

-Well it's a combination of Detroit, Flint, and Saginaw. See I was born in Flint but raised in Detroit, Flint, and Saginaw so yea.
DeFlinginaw by Dr. Nyte September 22, 2018
the act of fucking a girl who is way below any normal standards
person 1:so i heard you went derfing last night.
person 2:yeah, I took pcp.

I wanted to go derfing, to I found the girl nicknamed Trailer Trash.

Bonus points if they have a kid.
derfing by fred v. September 15, 2006
More from Urban Dictionary
anyone who succeeds in disgracing/over indulging themselves in the throws of clubland
28 hours and 4 clubs later, gurning for england but still refusing to go home - a total wrongun!!
wrongun by bevvers March 21, 2007
Word of the Day on October 8, 2026

square grouper

Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."
square grouper by slipsheet November 6, 2004
Word of the Day on October 7, 2026
A girl who does ballet and only talks about ballet. Her schedule is filled with dance classes which does not allow her to do any other activity.
"Hey, do you know that girl Sally?"

"Yeah, she's kind of annoying. All she ever talks about it ballet."

"Wow, what a Bunhead."

"Hey Sally, you want to hang out this weekend?"
"I can't, I have dance."
"You're such a Bunhead."

"Yeah... I know."
Bunhead by Jen00 October 24, 2014
Word of the Day on October 6, 2026

trucker's tan 

A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.
Word of the Day on October 5, 2026
The phenomenon where adults salivate at children's toys
Every time I walk into the toy aisle, I catch myself kidulting over the latest action figures and LEGO sets!
kidulting by Emotional Cruiser October 12, 2025
Word of the Day on October 4, 2026
British slang for a scientist or technical expert, esp . when the speaker is not certain of the expert’s specific field of study. Not necessarily derogatory, but typically used by persons without a technical background. In the US, the equivalent would be “egghead”, “squint”, or “geek.”

Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.
According to the boffins downstairs, the murderer used a serrated blade.
Boffin by Agnon February 11, 2023
Word of the Day on October 3, 2026
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