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A lersche is an unlucky adolescent, usually between 12 and 16, who displays many or all of the worst symptoms of puberty. Although lerches often display cases of bad acne and body odor, this term is not limited to physical awkwardness. It can even include characteristics such as poor hygiene, self esteem issues, social anxiety, and emotional instability. Lersches may have trouble fitting in or making friends. As such they often develop strange habits or personalities that further qualify them as a lersche.
Person A: Hey man, want to partner up for this project?
Person B: Sorry, I already have a partner. Why don't you work with that guy? He doesn't seem to have a partner.
Person A: Oh, him? Nah man, he's a total lersche.
Person B: Really? What's wrong with him?
Person A: He sweats like mad and has dragonbreath. The smell is unbearable.
Person B: That's disgusting! I thought his only problem was that he had bad acne.
Person A: That's why you never see him talking to anybody.
Lersche by Boast of Toast September 19, 2013
Related Words

Lipschitz 

Pulling a Lipschitz is the act of taking a bath in a stranger's house without them knowing about it. Most commonly performed at a party where you don't really know the hosts. This way there's probably a lot of loud music and distractions, and it will be easier to pull off. The term comes from the Rugrats character Dr. Lipschitz, who is supposed to be babysitting the kids, but instead runs himself a bath.

Also known as "pulling a Danny C."
Person 1: Hey, was that party last night any good?
Person 2: Nah, it was really lame so I tried to pull a Lipschitz. Unfortunately, the girl whose house it was heard me running the water and wasn't too happy about it.
Person 1: Ah man! You'll get it next time.
Lipschitz by Terry Yawkee March 2, 2011

Lipschitz 

A function f(t,y) is said to satisfy a Lipschitz condition on a set D if there exists a constant L>0 such that abs(f(t,y1)-f(t,y2)) < L*abs(y1-y2) for any y1, y2
Yo, Shelby’s got this IVP to solve, so you know she’s about to go fucking Lipschitz on the D.
Lipschitz by Moishe Turweston October 26, 2019
A lesch is that one drunk ass hole in the room that will be right next to you but still screaming. The one guy who gets really hammered but still be able to get everyone in the bar to love him.
Guy 1: that guy over there is such a lesch

Guy 2: who that guy over there that's completely hammered

Guy1: yeah, hey leschy that my girl

lesch: I know
lesch by SmurfSlayer3000 May 29, 2017
a group of people who live in mountains.
The Lepcha live in mountains.
Lepcha by Ohhh YEah April 13, 2008

Leuschke 

The socially unacceptable. Immoral human beings. Often known as having severe cases of explosive diareahh. Something you would find hanging from your ass hairs; these people are very clingy.

Many of these kind are known to have sexual relations with their young. Also have multiple personality disorders.
e.g. I took a shit and found some Leuschkes on my ass hairs.
Leuschke by IRUNLA89 March 17, 2010