Cyclopentamine HCl 

Cyclopentamine HCl is a drug which is a stimulant and a nasal decongestant. Freebase Cyclopentamine used to be in some nasal inhalers before it got replaced with Freebase Propylhexedrine. Cyclopentamine HCl can be measured in a Gemini-20 scale and dissolved in water or juice. Cyclopentamine can be used as a nasal decongestant, a pre-workout, or as a weight loss drug. Cyclopentamine HCl is weaker than Propylhexedrine HCl. Cyclopentamine releases

Tony: I tried 180mg of Cyclopentamine HCl and got energized. I had the best workout ever!

Cyclopentamine HCl by CognitiveFuel July 11, 2023

Cycling Brain 

It's the brain fog you get after a hard bike ride and the excuse you use for messing up simple things. It's your brain after cycling.

Forgot to water the garden - Cycling brain
Took a wromg turn while navigating - Cycling brain.
Messed up the spelling of wrong and did not notice it - Cycling brain.

Cycling Brain by copa6 July 12, 2023

Dirty-Cyclone 

The act of giving a limp wristed hand job with a back and forth rotating motion

Sally’s mum gave me the best hand job of my life. She called it a dirty-cyclone, I can’t wait to teach my girlfriend

Dirty-Cyclone by NeedyNeddy October 30, 2018

Cyclops

When you jizz on both eyes and mushroom stamp on the center of the forehead

I was trying to make sure she wouldn’t catch feelings so I hit her with the cyclops !!

Cyclops by Staksz April 29, 2019

Salty Cyclops

Ejaculating into the eye of another or oneself

In attempting to give Jill a pearl necklace, the force of my load made her a Salty Cyclops.

Salty Cyclops by Judicious June 25, 2007

cyclotron resonance 

plasma in a magnetic field is heated through the resonance effect when the vibration frequency of an oscillating electromagnetic field matches the gyro-frequency of the charged particles in the plasma. This effect is known as Ion Cyclotron Resonance Heating, and enables the generation of superheated plasma over 100 million degrees celcius of temperature.

this definition is pretty much ruining the title "urban" dictionary. but every dictionary should have something like cyclotron resonance.

cyclotron resonance by rockwell13 September 13, 2006

cyclist 

Someone who rides a bicycle regularly or participates in bicycling sports.

Lance Armstrong is an avid cyclist.

cyclist by PhotoBiker September 5, 2006