Self Sodomy 

The act of literally fucking yourself in the ass.

Did you hear what happened to Blake?
Yeah, somebody told him to go fuck himself. Who knew that would lead to five hours of surgery.

Self Sodomy, don't try it where your mom can find you.

Self Sodomy by Not Your Average Bear November 2, 2014

self-injury 

The act of hurting oneself for various reasons. Out of all the forms of self-injury, the best known forms are cutting and punching the wall. Cutting is usually considered as something done by angsty, sad teenagers that may or may not be considered emo, while punching the wall is usually done by irate, hot-tempered men who need to discharge their wrath against something.

The former is usually frowned upon for the already mentioned reasons, while the latter is usually considered as the manliest way to vent off the anger.

Example 1: Look at all these scars, you dipshit! YOU'RE AN EMO! KILL YOURSELF!

Example 2: You broke your hand because you got pissed off and punched the wall? AWESOME! Now that's manly self-injury!

self-injury by Acoyani Garrido Sandoval July 4, 2007

Self Entitlement 

Self Entitlement is described to be someone who think they deserve everything without earning it.

Unfortunately here, the word used by toxic parents in Urban Dictionary because they unable to control and manipulate their children as an extension of themselves, they think they are Self-Entitled that their 13 appearently child has to do all their home chores for them, appearently. Otherwise they dont deserve a single parental love.

The angry parent has a Self Entitlement, because he is thinking that the child has to do all the home chores for him, like washing the dishes, cleaning the floor and arranging their clothes, whilist not respecting the fact that It's their job to do so and because the Child has his own busines to do like School homework and the fact that the child actualy wants to rest from school and enjoy his free, leisure time.

Self Entitlement by Charus Channeling March 7, 2020

Self Fornication

The fornicating (Fucking) of ones self to ones self.

Lacey: I've been really stressed lately, and I haven't been with a man in a while. I don't know what to do!!
Maria: Have you ever tried Self Fornication?? It does wonders to your relaxation;)

Self Fornication by T.S Elliot (Modernist) May 20, 2011

Self-deprecating humor 

A type of extremely stale humor, mostly used by youtubers to deviate criticism, desperately make a joke, make up for bad quality of videos and/or appear naive to an audience.

Youtuber: hey guys sorry for the low quality of videos for the past years and the constant manipulation of my subscribers, but hey i’m dumb and i have a small penis, so what did you expect LMAO

Audience: oh that doesn’t matter, we completely forgive you, you used self-deprecating humor and clearly see your faults!

Self-deprecating humor by pphard September 29, 2018

Self medicate 

Verb: to masturbate; satisfy ones self sexually

Melanie Griffith isn’t that hot. I mean I wouldn’t kick her out of bed, but I’m not going to self medicate to her.

Self medicate by NTank06 January 3, 2018

Self reliance 

Something the Chinese government doesn't believe in.

Communist China doesn't believe in self reliance because they don't let their citizens choose how to earn their own money.

Self reliance by UltimateDoge May 25, 2021