Im only doing this because the old definotions are cringe bro.

Anyways, Jacksepticeye is a person on yoytube with over 23.8 million subscribers. He promotes PMA, has Siren Head as a dad and is irish. He also has a girlfriend that goes by Gab Smolders on youtube. And he steals knees.

Run.
Friend 1: Hey, you know Jacksepticeye?
Friend 2: No, but ill watch a little bit... oooh what about this old undertale series he did?
Friend 1: WAIT TURN DOWN YOUR VOLUME-
Friend 2 died that day. It was truly a gamer fail. Press F to pay respects.
by flipperrolls May 5, 2020
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A funny, childish, loud, energetic, Irish YouTuber who will always be there for you even if he doesn’t know it, he’s the heart and soul of PMA (Positive Mental Attitude) he will always make you laugh or even crack a little smile, he’s also very in touch with his feminine side and isn’t afraid to show it, we love jacksepticeye
Friend: why do you like jacksepticeye so much, he’s just a man playing video games

Me: look him up in the Urban Dictionary, then you’ll understand
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Put a human brain inside a potato and it'll come Jacksepticeye.
Also who gave it a camera?
by GadriX December 23, 2019
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A loud and amazing irish youtuber. A.k.a. Seán William McLoughlin. He us one of the most successful youtubers with over 14 million subscribers. He is also very good friends with Pewdiepie, Markiplier and many others. He has a girlfriend Signe Hansen and she also haves a youtube chanell Wiishu.
I am so obsessed with Jacksepticeye it hurts
by MinionMaster93 March 19, 2017
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An absolute Boss Irish YouTuber that has 23.8 Million subscribers and has a channel full of variety e.g. gaming ; Meme Time ; Jacksepticeye's funniest home videos ect.
Jacksepticeye's new Meme Time video has my laughing for hours!
by Floorgang hooo May 6, 2020
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