besserwisser 

From German. Meaning "knowing better". And that's exactly what it refers to, like the more common "smart ass" or "wise ass", or even "smart elick" (smart aleck). A besserwisser - or wise ass - is a person, often intellectual, or at least pseudo-intellectual, who thinks he or she has more general knowledge about things than most others. It can be correcting language mistakes in grammar and spelling, or it can be within a specific topic like everything from politics, geography and baseball to history and science - anything you can imagine!

- You know that "bananarama" dude at the Madonna forum? Jeesuz, he's so annoying! Such a besserwisser! Whenever I make the tiniest spelling mistake, he's there immediately to correct me and make me look everything but good. And whenever there's a discussion, he always claims he is the one with the correct answer. Every single time - it never fails! Even though I've caught him in misleading knowledge at least a handful of times!

besserwisser by queerboyoslo December 20, 2005

Lesserwisser

Someone who insists on explaining things they know little to nothing about, usually to someone with expertise in that particular area.
Compare: mansplainer

"No really, women don't actually need tampons or pads. They can just hold it in."
"For f*cks sake, Dan, you're such an arrogant lesserwisser."

Lesserwisser by Talisanna December 29, 2020

lesserwisser

a gender-neutral version of a mansplainer OR someone who corrects others even though they themselves lack expertise and / or the person who is corrected has more expertise in the area.

"thats not a very good answer, i wouldnt have written that if i were you."
"come on jessica, dont be such a lesserwisser."

lesserwisser by chopinomaniac February 5, 2021

Besserwusser 

Part of either the names of German Know-It-All or Another Word For Wuss Pingu cassettes. Used to refer to Pingu.

What the Besserwusser is he doing?

Besserwusser by Acylos The Silver Predator December 26, 2022