A laughing fit, usually one to the point where you can barely breathe. In some situations, your muscles might cramp from being tensed up laughing.

Likely originated from the musical In Trousers by William Finn.
I swear to god, that shit was so funny, I felt like I was having a giddy seizure
by whizzer going down October 9, 2023
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Seizure time is a time that occurs at either 10am or 10pm. It involves two or more people either keyboard smashing or having a seizure because they are gayly gay. It symbolizes either friendship, love, or an intense religion involving seizures.
“Oh my, it’s seizure time!” Kaylin said.
“It is?” Aliyah replied. “You know what that means.”
“haiwnwvswishebuhspqbsbzheoqb” they both typed for a full hour.
by Nxghts June 23, 2019
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Marked by BDE and born from the idea that men with small packages coined the expression “It’s not about the size, it’s about the motion in the ocean”; men with heavy packages can now imagine the little guys falling out during sex due to having little to no shaft.
So when they’re doing it, they gotta just scissor you basically or they’ll fall out. Gotta seizure to please her?
by Kilobravo January 8, 2022
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ah-shee-LEP-tick SEE-zh-ur (noun)

an occurance that occurs when ashy reads JESAUS and somersaults off their chair and dies.
harper: *types jesaus*
ash: *has ashyleptic seizure*

later, at the funeral:

ria: "wtf happened?"
harper, in tears of laughter: "they had an ashyleptic seizure"
by trashy._ash December 16, 2020
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When one laughs so hard, their whole body flails violently.
by aGina June 6, 2015
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When someone has a fit

(Squealing, Giggles, Kicking of Feet and Legs, Jumps of Joy, etc)

over something they are very passionate about.
Dude 1- "Dude, did you give your hot employee those sick-ass shot glasses for Christmas?"

Dude 2- "Yeah, brah. She had a total fucking Nerd Seizure when I gave it to her, I think I totally scored."
by YourAsianFriend December 28, 2011
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1. When you're in a group chat and your phone won't vibrating

2. When your best friend is annoying and won't stop texting you
by tamowl March 12, 2016
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