That involuntary crazy-go-nuts wiggle dance that you get sometimes after you pee. Check out the sciencey stuff on Wikipedia.

Also known as a peegasm or pee shivers.
Buddy 1: Hey, Buddy 2, this morning I had to take a huge leak and I totally got post-micturition convulsion syndrome afterwards.

Buddy 2: Alright, Buddy 1! I totally got post-micturition convulsion syndrome this morning too! High-five!

Buddy 1: I guess this makes us post-micturition convulsion syndrome pals!

Both: HA HA HA HA!!!111ExclamationpointOnezorz
by I love to piss November 30, 2007
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A spontaneous action done by a couple when shushi - and a matchking appetite - and hornyness are combined. The female partner assumes a position in which hips are angled from 45° to 90° degrees. Thereupon shushi, Makizushi is considered the cold standard, is inserted into the vaginal vestibule, topped up with soy sauce. Through the power of contractions, the female attempts to force the shushi into the male's mouth, which is optimally positioned between the female's thighs, flushly against the vaginal opening; however, the positioning of the mouth is not perscribed, and changes may be made for trickshotting, ultimately making this a fun, bonding and competitive experience for all participants.

This stunt is only enjoyable with a female who is based in Los Angeles. The origin of the male partner is largely considered irrelevant. This is reasoned by the destinct flavour and state of vagina - reffered to as punani - of Los Angeles Females: They often flaunt a fishy smell and taste, which is primarily caused by dried seminal fluid in the general area. This specific variation of punani is perfect for shushi, as it complements the taste.

For beginners, it may seem hard to engage in a Los Angeles punani sushi convulsion, as it is not always easy to find the right punani. However, experts have found that for an attractive, muscular male specimin, taking a shirtless walk on one of LA's many boardwalks will present many oppertunities.
Ever since I've experienced the Los Angeles punani sushi convulsion, shushi has never been the same for me, dude.

Hey bae, Los Angeles punani sushi convulsion later?
by broken1244 June 26, 2021
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Urgent, violent, explosive defection followed by overwhelming relief.
I had to bust out of the meeting in fear of a poopalactic convulsion.
by NimbleFruitJube August 7, 2023
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