master cylinder 

A 24oz can of Malt Liquor sometimes referred to as a tall boy. The original Schlitz Malt Liquor had the words "Master Cylinder" written down the side of the can.
More recently it has reappeared on a show entitled Frisky Dingo as a form of pant.

"Gonna get me check, get me a master cylinder, and get f*cked up!

master cylinder by NoMeansMaybe May 12, 2011

cylinder index 

The total number of internal combustion cylinders in your possession. (vehicles, gas powered equipment, marine and aviation all qualify). Popularized by "Garage Logic" A radio show on Minnesota's AM 1500.

"I have a cylinder index of 48"

cylinder index by Charlie Dank July 28, 2007

master cylinder 

The term was coined in episode 11 of Frisky Dingo. It is the act of wearing a beer can for pants.

Torpedo Vegas: I'm getting furious at you, you don't even have any pants on.
Xander Crews: Neither does he!
Torpedo Vegas: Well he doesn't have a penis! As far as I can tell...
Killface: I - uh -
Xander Crews: Yeah, what is the story on that?
Killface: Oh, like you can talk.
Xander Crews: Hey, my penis fills an entire tall-boy.
Quick cut to Xander, as Awesome X, dancing in front of the X-ticles, naked except for a beercan covering his groin and shouting "Master Cylinder!" through a megaphone. Cut back to Torpedo Jones' lair
Torpedo Jones: Scoffing I'm sure it doesn't fill it.

master cylinder by HC2005 August 30, 2007

Cylinder 

A cylindrical shaped object attached to a larger structure that is stuck inside a mini m&m tube with butter and microwaved mashed banana stuffed inside.

Person 1. “I need help removing a cylinder stuck in a mini m&m tube”

Person 2. “Have you tried sawing the tube?”

Person 1. “It’s imperative the cylinder remains unharmed”

Cylinder by That_is_mine May 29, 2023

Firing on all cylinders 

Work or function at a peak level of performance.

Work as expected, or at 100%

Teller: The lady tried to rob the bank using her fingers as a gun
Police: She doesn't seem to be firing on all cylinders

Firing on all cylinders by smoking_acez May 1, 2018

Cylindrical Pouring Device 

A jug.

You understand?

Just a jug.

IT'S A FUCKING JUG!

<TheJoker> Yo, pass me the CPD, I'm thirsty.
<LD> IT'S A JUG, DAMN YOU! A JUG!
* LD hurls a jug at TheJoker
<TheJoker> Oh no, my face! I have seen the errors of my ways!

Cylindrical Pouring Device by LD December 15, 2004

Cylinder Earth

The REAL shape of the Earth

It is a religion who follows the laws of an 11-year-old boy who we believe to be the one, da queen, the holy one, our Lord and savior who created life and the cylinder earth the place we call home.

Cylinder Earth by Cylinder Earther 11 February 18, 2020