Where you think you're more awesome than everyone else, and that your opinions are so right, they don't require justification and everyone else is stupid for thinking differently.
Person 1: "I disagree with you, I think the Beatles is a boy band because some of their early stuff shows especially the commercialism aspect of boy bands."
Jack: "That's wrong, obviously the Beatles isn't a boy band."
Person 1: "That's actually the Jack Fallacy, not a real argument."
Jack: "Anyone who doesn't believe in God is an idiot, there's obviously a God."
Person 2: "the Jack Fallacy."
Jack: "That's wrong, obviously the Beatles isn't a boy band."
Person 1: "That's actually the Jack Fallacy, not a real argument."
Jack: "Anyone who doesn't believe in God is an idiot, there's obviously a God."
Person 2: "the Jack Fallacy."
by TessaSalem November 16, 2012
Get the the Jack Fallacymug. The absolute dumbest person you will meet, very rude and selfish, unhygienic, walks like a giraffe and thinks he's the man. Does griddy way to much even tho its not funny anymore. small everything
Person 1: “i think i like jack”
Person 2: “JACK?”
Person 1: “yeah..”
Person 2: “we are NOT friends anymore wtf”
Person 2: “JACK?”
Person 1: “yeah..”
Person 2: “we are NOT friends anymore wtf”
by Little_timmy-yum January 26, 2023
Get the Jackmug. "Oi, you call these 'chips' instead of crispity crunchy munchie cracker jack snacker nibbler snap crack and pop westpool chestershire shire queen's lovely jubbly delights? That's a rather bit cringe innit bruv."
by AMERICA RAHHHH December 11, 2023
Get the crispity crunchy munchie cracker jack snacker nibbler snap crack and pop westpool chestershire shire queen's lovely jubbly delightsmug. 
No one likes him they always makes fun of him and thinks he is just dumb but always tries his hardest to be friends with everyone and never means to be annoying and he is always sorry when he his told he is annoying
by MelloToonz January 21, 2022
Get the Jackmug. I’m not buying it. Not going for it
Doug said Mike won a million dollars last night playing lottery. Man he still lives with his mother I’m not Jacking that
by Dreamer of Yah October 4, 2021
Get the Not Jacking Thatmug. by GarTig December 30, 2019
Get the Limping Jackmug.