Deprecation 

an extended period of misery and unproductiveness, especially one spent away from home or in travelling.

John Gould went on a deprecation so that when he returned to work he was more motivated and productive than ever before.

Deprecation by Deferent thinking August 7, 2022

self-deprecation 

belittling one's self: the act of belittling yourself or your achievements

She has low self-esteem and is prone to self-deprecation.

self-deprecation by BobTheMan October 20, 2005

Self-Deprecation 

Making fun of oneself for entertainment. It's usually done by people who are depressed, but you shouldn't just assume.

Self-Deprecation is such a common form of humor, even Urban Dictionary itself does it.

Self-Deprecation by Ubeenbamboozledson August 8, 2021

Rhombic Theory of Rizz Deprecation 

A theory written by Rhombicosidodecahedron stating that:

If one is to attempt to obtain an addition of rizz to a current value of rizz, which is an addition of great magnitude within a time period of minuscule duration, he shall retain his current rizz and shall not gain any but an addition of magnitude whose value shall be lowered, while also becoming subject to ridicule and chastisement which shall cause the deprecation of the magnitude of the intended addition of rizz.

Bob: Imma come to school tomorrow with some gucci clothes and a new rizzful haircut and also some white shiny teeth and cologne and imma get all them girls
Joe: that's too sudden of a change. You should follow the Rhombic Theory of Rizz Deprecation which essentially says if you try to make such a sudden and dramatic increase in your rizz you will look bad
Bob: that's a shame

Rhombic Theory of Rizz Deprecation by Rhombicosidodecahedron September 3, 2023

self-deprecation 

Modesty abducted and bound to a pedestal.

I am the king of self-deprecation.

self-deprecation by Master of Disater July 15, 2003

Lateral Deprecation 

When somebody puts their owns looks, intelligence, talent, situation, etc down while someone else close to them has it worse than them. Can also be called diagonal deprecation. For example, if a person says “I’m so stupid” with a 4.0 GPA, it’s kinda rude when your friend has a 3.7.

Tom: “God I’m such an idiot. A 97 in math.”

Fred: “I got an 87.” :(

Fred’s head: “Does he know about lateral deprecation?”

Lateral Deprecation by I<3PeterGriffin&Shesty April 17, 2024

Faux Defecation 

When one sits on the john for some amount of time before realizing they cannot release their fecal matter. The cause is sometimes constipation. However this is not always the case; the cause may be unknown. It is not uncommon for one to release gas during this period of time. Time elapsed before the epiphany varies greatly, experts suggest times from 1 minute all the way to a rare case in Japan in which the subject took over 27 hours (exact time is unknown). The mean is 11 minutes. The standard deviation, or σ, is approximately 7 minutes. Time does vary between species and sex.

(Whilst watching a football game)
John: Brb, I gotta take a dump. *10 minutes later*
Henry: Dude wtf are you doing? You just missed Janet Jackson's boob!
John: Damn I can't shit!
Henry: Oh man, you must have a case of Faux Defecation

Faux Defecation by gingyman January 9, 2010