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An extra pocket sewn into the inside of men's underwear so that older men can have their scrotum supported.
Grandpa was hanging so low he needed a boxcar so he could wear his shorts.
Boxcar by TruckdrivingMonkey June 29, 2014
One of those disgusting looking rectangular vehicles like the Scion xB. Most people would never buy such an ugly thing, but some just have strange tastes and preferences
The Laguna Beach youth parked his new Scion xB boxcar in the cul de sac, where it became an eyesore to the neighbors
boxcar by Boxcar Bob November 7, 2008

Boxcar Social 

1. A party or social gathering often taking place inside an abandoned or otherwise derelict boxcar.

2. A party hastily thrown together by hooligans, usually involving depravity and debauchery.

3. A party or social gathering where everyone dresses up as newsies and flappers.

4. A race with contestants dressed up as newsies racing vintage pedal cars.
Mr Kemp invited me and Atticus to a boxcar social tomorrow evening.

Some old friends are holding a boxcar social but I don’t know if I will go, the cops usually show up and ruin the fun.

A boxcar social is being held a few blocks away. Would you like to dress up and head on over?
Boxcar Social by gypsywrangler January 2, 2022

boxcar haircut 

A haircut popular with teenage boys in the 1950s: Longish on the sides combed straight back and with a flat top wiffle pushed up in front with butch wax.
My girlfriend thinks I look like a TV star with my boxcar haircut.
boxcar haircut by Allen109 May 22, 2017

boxcar kid 

Someone who doesn't wear socks with fake retros
Dylan wears fake retros with no socks. What a boxcar kid!
boxcar kid by Boxcar Billy May 17, 2016

boxcar willie 

The act of sexual intercourse on a train.
The trainride was boring, til my girlfriend and I did the boxcar willie in the dining car.
boxcar willie by ezcccc May 17, 2010
More from Urban Dictionary
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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