The longest word in any of the major English language dictionaries is pneumonoultramicroscopicsilicovolcanoconiosis, a word that refers to a lung disease contracted from the inhalation of very fine silica particles, specifically from a volcano; medically, it is the same as silicosis.
Sorry mam

What is it ?
pneumonoultramicroscopicsilicovolcanoconiosis

NOOOOOOO
by Α January 24, 2022
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Person 1: hey dude wanna hear the longest word?
Person 2: is it supercalafragilisticexpialadocious?
Person 1: nope.
Person 2: what is it then?
Person 1: pneumonoultramicroscopicsilicovolcanoconiosis
by SnowytheVulpix January 20, 2021
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A lung disease

Also the longest English word in the Oxford dictionary.
He has pneumonoultramicroscopicsilicovolcanoconiosis
by DictionariesArePeopleToo May 26, 2019
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1. A lung disease
2. Easy way to end the spelling bee quickly
Do you have pneumonoultramicroscopicsilicovolcanoconiosis? I do and I'm suffocating or something.
by Rand0mS7uff5 February 07, 2015
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An inflamable lung disease caused by inhaling very fine ash and sand dust.
Person 1: Hey! Did you hear about someone getting pneumonoultramicroscopicsilicovolcanoconiosis?
Person 2: Yeah! I heard one of my classmates got pneumonoultramicroscopicsilicovolcanoconiosis!
Person 3: Must you use the longest word in the dictionary?
by a guy thing December 10, 2021
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Bruh, I didn't even. know how to pronounce this word, I had to look it up.
Pneumonoultramicroscopicsilicovolcanoconiosis is actually the longest word in the English dictionary. Supercalifragilisticexpialidocious aint got nothin on this word.
by AlexDoesWeerdStuff December 04, 2020
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A lung disease caused by inhalation of ash
Peppa pig: I have pneumonoultramicroscopicsilicovolcanoconiosis
by Microwave.mp4 (þ fan) February 11, 2020
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