halleys comet 

Gaseous ice ball appearing every 80 years or so

Man "Hey I can see Halleys comet in the sky !" . Comet expert "Best place for it I say"

halleys comet by binsurfer December 11, 2003

Halley's Comet 

Often referred to as a girl's butthole. Usually one that is large in size, similar to that of a comet.

I just saw Halley's Comet!

Halley's Comet by Bon Skribit April 19, 2009

Halley’s Comet 

An activity involving a woman 74 years old or older (Halley’s comet comes every 74 years) where the male is having sexual intercourse with the female “doggy style” in the anus. After he releases his blessed seed in her anus he pulls out where as the the female immediately farts and reaches behind and lights the fart, hence, releases the flaming comet on the poor unfortunate male with a beautiful glistening trail following behind from his seed. Extra points if her name is Halley.

Example: Joe was fornicating with Alexandria when he orgasmed and she released a Halley’s Comet on him that the world has never seen making Superman himself blush yet grow stronger........

Halley’s Comet by Halley’scomet November 21, 2020

Halley's Comet 

A variation of streaking where a glow-stick is affixed to the genitals and a tail of approximately 4 feet of toilet paper is wedged between the butt cheeks. Best done in low light conditions.

*shreiking*
What was that?

Steve did the Halley's Comet.

Yeah, but why?

Halley's Comet by Theprofessorguy October 29, 2018

Halley's Comet 

Halley’s Comet (n): a euphemism for the violent projectile formed when a man cumshots a kidney stone. Not to be confused with commonplace occurrences like the ‘cum cork’ or ‘poop noodle’, the Halley’s Comet is a once in a lifetime experience characterized by:

(1) the catastrophic release of pressure necessary to cause a kidney stone to exit the urethra with a minimum muzzle velocity of 500 ft/s (152.4 m/s in CommieSpeak). The terminal ballistics of any given comet is determined by both the mass of the stone and the anger placed into the cumshot.

(2) the signature formation of a white trail of liquid aerosol cum behind the comet which lingers in the air for several minutes, causing it to be dubbed ‘procreative napalm’ by Single Mom’s Magazine.

There are no reported fatalities from direct Halley’s Comet impact (in the 1st world) however they do account for over 1 domestic ER visit a day in the US alone. Halley’s Comets are the leading cause of PTSD in men over 40.

Psychologist: “Tell me about your most recent Halley's Comet ”
Patient: “Just like the other ones, my dick looks like a waffle cone... My neighbors flipped out on me because they thought I intentionally shot their dog with a bb gun, then when I explained that I accidentally killed their dog with my exploded bee-hive looking dick, they just freaked out like I said something ridiculous.”

Halley's Comet by Dice E Fleisch March 30, 2015

Halley's Comet 

A Halley's Comet is a particularly large, compact bowel movement that is so efficiently delivered to the toilet that it does not require any toilet paper whatsoever for clean up. The term "Halley's Comet" suggests the rare nature of this achievement... likely to genuinely occur only once or twice in a lifetime.

"Man, what a wicked dump. Felt like a Halley's Comet, but it turns out I still needed some toilet paper."

"I ran out of toilet paper last night. Fortunately, I had a Halley's Comet this morning, so I was good to go."

"That was the most satisfying shit I've ever had. Pure Halley's Comet. I hope I have another one in the next 80 years or so."

Halley's Comet by Sachin is the God March 29, 2017

Halley's comet 

After cuming and cleaning up with tissues, throw the tissues at your root to create the flying halley's comet.

"hey bitch, catch this" as i throw halley's comet at her back.

Halley's comet by Mr meanings May 16, 2011