True Canadian Shotgun 

A True Canadian Shotgun (TCS) is the best pick-me-up for any time of the day. Although this shot gun uses Tim Hortons coffee instead of beer there is still some alcohol involved. A TCS is made up of three liquids: Tims coffee in a Tims to-go cup (as mentioned before), Canadian maple syrup, and Canadian rye whisky (preferably Crown Royal).

To do a TCS you first make sure the lid to your coffee is on well, then flip the cup upside down and poke a hole into the cup, just like you would if you were shotgunning normally. Then add a shot of whisky to the coffee and shotgun away. After you have shotgunned the coffee and whisky mixture use Maple Syrup as a chaser.

A good drinking game to play is whenever you see a moose you have to do a True Canadian Shotgun. (Best played when in Newfoundland)

Dean: Damn Jack you seem really down.
Jack: Stephanie just dumped me because I’ve been bangin the noodle to much.
Dean: Harsh man, here come do a True Canadian Shotgun with me and you’ll feel better.

True Canadian Shotgun by 5wampDaddy July 17, 2018

farmer with a shotgun 

The most powerful character in the Dragon Ball Z franchise. He first appears in his fight with Goku’s brother and fakes his death and husband pulling the strings of the whole dragon ball Z and Dragon Ball Super franchise. The farmer with a shotgun eventually ascended and became the most powerful character ever even surpassing the likes of the Omni king. Nowadays he just watches from the shadows seeing how long it will take until Goku’s and the other Z fighters braids pops from constantly screaming

farmer with a shotgun is the most strongest character ever dragon ball Z‘s history

farmer with a shotgun by Darrrrren June 15, 2018

driver picks the music, shotgun shuts his cakehole 

A quote made famous for its use in season 1 of Supernatural. Implies that the driver of a vehicle chooses what music they and the passengers will listen to while whoever is riding shotgun must stay quiet.

Sam: You gotta update your music collection. Black Sabbath? Motorhead? Metallica? It's the greatest hits of mullet rock.

Dean: Well, house rules Sammy. Driver picks the music, shotgun shuts his cakehole

driver picks the music, shotgun shuts his cakehole by KnightofNerdom October 1, 2019

Mexican Shotgun 

After eating a large amount of Spanish food and while life is fine and dandy you get the "Oh, no" face. And abruptly leaving the table, running to the restroom. Making it to the restroom gliding across the floor as to not have any impact. Once in the stall, you fumble with the pants forgetting how to unbuckle pants as if it were the most impossible task.
Great Success.
Then taking pants and underpants off at same time, once they hit knee area, fully expecting to make it to ankles. But unexpectedly once at the knees, your poor lack of timing causes your tightened sphincter muscles to release. Your only course of action at this point is to attempt sitting before your poop spray coats the walls. But alas, it is too late. There is now a shotgun blast of poop starting on the walls waist level leading to inside the toilet bowl. You continue to finish all of your amazingness into the toilet. After the sweaty unfortunate event, you wipe up your butt as opposed to your neighbors, picking up your pants and leaving the restroom in shame. Anyone else entering the restroom will know that the last person to use this stall was the victim of a mexican shotgun.

I totally Mexican Shotgunned the Denny's bathroom. There were no survivors.

Mexican Shotgun by TheRealMascot January 10, 2015

a silent shotgun 

This is a disease such as MS or ALS which causes lesions, aka holes, in key organs of the body.

She has lost so many neurological functions to MS it is as if she had been hit by a silent shotgun!

a silent shotgun by I, Wreckerrr December 13, 2020

ride shotgun 

1. To ride in the front passenger seat. The phrase is a direct allusion to the armed guard who sat beside the stagecoach driver
2. To keep a watchful eye on something or someone

Jon gets sick during long trips so he always prefers to ride shotgun

ride shotgun by WebC October 28, 2007

call shotgun

If you call shotgun, you get the privilege to sit in the passenger seat in front, next to the driver.

(Group of people)
Steve: I can give you guys a lift if you want.
Bob: I call shotgun!
Andy: Darn Bob, you already sat in front last time!

call shotgun by JayEffEff January 28, 2011