Circadian fail 

when your level of fail becomes just as natural as your bodily processes.

Guy #1: Dude, I swear that's the 5th time John accidentally hit on his sister while out clubbing.

Guy #2: I think John's a prime example of circadian fail.

Circadian fail by Seargant007™ August 30, 2010

Circadian Terrorism 

1. The blatant use of disruption to keep a group or individual from falling or staying asleep.

2. To cause disorder in one's circadian rhythm as a result of direct or indirect obstreperous actions.

John: Hey Steve, are you alright? You look like hell...

Steve: Not really man, I was up all night studying for finals. I finally went to bed around 4:00 AM only to be awoken at 7:30 AM by an act of circadian terrorism.

John: What do you mean?

Steve: Well, my neighbor seems to enjoy hiring bands of workers to stand outside my bedroom window before the crack of dawn and hammer things.

John: Wow, that fucking sucks.

Steve: Yeah.

Circadian Terrorism by big tall giraffe December 18, 2010

Circadian Backflip. 

The circadian rhythm is the cycle that dictates what your body does when: secretions, sleep, awake, temperature fluctuations, etc; but most importantly, when it does those things.

A circadian backflip is something shift workers and people stuck on night shift experience, when they wake after dark, and go to sleep after dawn.

Person 1- "Where's Cornelius lately? I haven't seen him in months!"
Person2- "Me neither. Since he started his new job he's had a full-on Circadian Backflip. He looks just like Bela Lugosi now!"

Circadian Backflip. by JayszunVanderwerff July 24, 2011

circadian rhythm method 

A type of birth control in which one partner drugs the other with a sleeping pill prior to sex, with the intended effect that such person will fall asleep prior to ejaculation. This method is even less effective than the rhythm method and is not recommended.

"We're out of condoms, but it's no problem... I've got enough ambien for us to use the circadian rhythm method."

"Well, she's not on THE pill, but she's on A pill... circadian rhythm method style."

circadian rhythm method by maxkeepsitreal1 May 22, 2008

Circadian Lactose Intolerance

A person, normally a young woman, who cannot tolerate drinking milk after 12:00 PM, eastern standard time.

"No, I'll take my coffee black, I really can't have milk at this time of the day. I just got diagnosed with C.L.I, better known as Circadian Lactose Intolerance.

Circadian Lactose Intolerance by Jack Sparrow Wants This Woman March 1, 2009

Circadian Overflow Reset

The act of fixing or changing one's sleep schedule by going to sleep later rather than earlier. Most commonly done by staying up all night and the next day, then going to bed at the desired time.

At the end of summer break I usually do a circadian overflow reset to get my sleep schedule normal again

Circadian Overflow Reset by VeldoraTheStormDragon March 6, 2026

circafan 

It's a replacement for the word "f*ck" or "Hell." Generally used by the people of MLIA, often describing whatever OP did this time.

Mobile- "...the Circafan?"

KWinchester- "It's ok Mobs, just take deep breathes."

EugeenieWeenie- "I have to pee."

Everyone- "Why the Circafan would you tell us that?"

circafan by TOTR March 14, 2010