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Boston Turn Signal 

A lude gesture involving the extension of the third finger on the left hand out the window of a moving vehicle. While this gesture is most often reserved for the operator of the vehicle, passengers in the front and rear may be recruited as needed. ie. flying the bird as an excuse for driving like a masshole.
Jonny flashed his Boston turn signal as he cut off all the oncoming traffic.

Turn signal 

A mythical object, believed to be found inside automobiles in or around Philadelphia.
If only there was a way to signal this turn so the person behind me knows what my intentions are. Oh well I'm from philly and wouldn't use a turn signal anyway.
Turn signal by Coooolringi March 3, 2014

California Turn Signal 

Flipping the bird, usually to another driver, either upon witnessing an act of pure idiocy or during road rage.
That old fart is doing 20 under the limit in the carpool lane....give 'em the California Turn Signal, will ya?

Illinois Turn Signal 

When a driver from Illinois suddenly veers into your lane for no reason, with no turn signal whatsoever. Usually performed at high speed, and when no other cars are in the vicinity.

The idea to teach the concept of "turn signals" has been floated through years in Illinois driver's ed schools, but nothing serious has come of it.

Outside of Illinois, it is most often seen by Wisconsin and Indiana residents due to the prevalence of FIBs.
Two guys in a car: one from Wisconsin, the other from Illinois.

Wisconsin driver: That asshole just cut me off!
Illinois passenger: Oh come on, he did use the Illinois Turn Signal.
Illinois Turn Signal by TheSchnauf November 14, 2011

turn signal 

the light that indicates which way you are going to turn while driving....a lever to left of the steering wheel is raised or lowered to start the flashing of the light
Most drivers these days are not aware that their cars come equipped with turn signals, or they are just too "busy" to use them- they expect other drivers to be psychic and figure out what exactly they are doing- it is infuriating!!!!!
turn signal by Meadow Soprano December 6, 2005

Maryland turn signal 

When you turn your turn signal on when you are already in the process of changing lanes
In high traffic I use the Maryland turn signal when changing lanes so I don't get blocked out
More from Urban Dictionary

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

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
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