This can refer to either:

1) The common feeling of a 'shiver' or spasm throughout the body a minute after orgasm/ejaculation, possibly due to the body reacting to the sheer amount of pleasure that was just produced.

2) The manifestation of several 'mini orgasms' after climaxing, commonly expressed through subsided moaning/breathing noises and other vocal responses indicative of pleasure. It is caused by the mind continuously reflecting on the euphoric pleasure that had just occurred, making you moan in response. Depending on the degree of pleasure, such mini orgasms can manifest for up to an hour.

3) Both of the above
1) After Jake received his first blowjob and climaxed, he felt the post-orgasm aftershock within a minute, sending spasms throughout his body. The giver interpreted that as an indicator that he enjoyed it.

2) After teasing his cock for 30 minutes straight, she finally let him cum. The orgasm was so powerful that it sent a post-orgasm aftershock throughout his body. He kept moaning for an hour straight due to the sheer amount of pleasure that was done to his cock.
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The Puerto Rican Aftershock is a sexual move discovered by Columbus during his voyage to the beautiful island.

Upon climax, the male participant deposits his ejaculate in the small of his partner's (preferably a female human or goat of either sex) back when performing the 'el perro' position (translation: doggy style) or on his lover's chest between her chi-chi's (breasts) so it forms into a small pool. The lover is then ordered to stay still so the pool of love icing remains still. Movement that disturbs the canyon of cum results in a donkey punch. Note, if the partner is a donkey, it is just a punch.

The male then adds the juice of the passiflora edulis or passion fruit to the mixture. Rubbing the tip of his still chubbed (3/4 erect) penis into the salty sweet concoction he then fills his lover's mouth with the mixture delivered via his penis. It is considered rude and unappreciative if the partner lets any drop of the liquid fall to the floor.
After a night of dancing Doug took Rebecca to their hotel room in El Condado and performed the Puerto Rican aftershock.
by Ranger of Three Finger Park February 2, 2010
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are days when people can't get over the holidays and still feels like celebrating, they skip work/school/duties and enjoy the rest of the days like it is still the holidays.
Laila and Ren skipped worked because they feel the holiday aftershock.
by pen486386 January 6, 2011
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Noun. Plural "aftershocks". A small shit that comes upto 20 minutes after a much bigger shit.
Person 1 emerges from bathroom.

Person 2: That was a pretty big shit.
1: Yeah. Anyway, how're you?
2: I'm good, you?
1: Yeah, I'm doing alrii
A look of terror comes over Person 1's face.

1: Oh no! Aftershock!
Person 1 runs back to the toilet clutching his arsehole.
by TheFoulestBeastOfThemAll December 18, 2015
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When a woman has an orgasm in the moments after intercourse has ended
Jodi you can't believe what happened to me. After my husband and I made love the other night I was laying there recovering from the last orgasm and another one hit me without being touched!!! It was like an aftershock!!!!!
by bigerq January 18, 2017
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second smaller burp or fart after an explosive burp or fart
Man!!! Roni's aftershock was harse. She even scared the dog!!!
by stormy red hair February 7, 2010
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After dropping a huge deuce in the toilet, wiping and thinking youre done, another round of dookie is ready to escape the bum hole, and you are immediately back on the porcelain throne. Does not need to be diarrhea.
*Person 1 exits bathroom*

Person 2: Finally

*Person 1 eyes widen and rushes back in*

Person 2: Hey! You literally just finished

Person 1: I got Aftershock Shits dude!
by Doll of nightmares September 4, 2022
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