Obrigatory 

which has the power or the legal force to compel;

involving obligation;

that is not optional;

clear;

indispensable;

You must complete this task to complete your essay, Junior. It's obrigatory!

Obrigatory by Anon12576343 October 26, 2010

Obligatory surfing 

When you are stuck in a flood or bizarre water situation and you get in a random object so that you can surf with it and survive.

Yesterday i was obligatory surfing in the waters of the tsunami.

Obligatory surfing by walt46 April 2, 2011

Obligatory Psychotic Jackass 

An Obligatory Psychotic Jackass refers to somebody who is self-elected as the rude, obnoxious and possible bully of the school. An example of this is Logan Echolls off the fictional television show “Veronica Mars”

VERONICA MARS: And let’s not forget Logan Echolls. Every school has an obligatory psychotic jackass. He’s ours.

YOU: "Oh my god! Look at that guy! He's a total obligatory psychotic jackass!"
ME: "Yeah, he acts like early season one Logan Echolls!"

Obligatory Psychotic Jackass by Red Ruby June 17, 2010

Obligatory Digestive 

When you lowkey want to show your friends that you're doing something cool.

Ivar wanted to let his friends know that he was drinking and beeing all cool, but lowkey. So he uploaded a picture of a vodka bottle and a package of digestive cookies, and said that the digestive cookies were obligatory, therefore Obligatory Digestive.

Obligatory Digestive by JokerSnoker February 16, 2017

obligatory like 

When a person likes something on facebook because it was written by their friend

Hey man, did you see John's status the other day about his ex? What a pussy.

Yeah. I felt bad though, so I gave it an obligatory like.

obligatory like by jhonda555 January 20, 2012

obligatory downvote 

No matter how funny, good, intelligent or rare a video/picture/post is, there will always be someone disliking it, and if it's only for the sake of preventing a 'perfect' voting. Also, downvotes arise from jealousy, hate or any other form of secret respect.

person 1: dude check out this video, its a child doing a backflip while making pancakes on the back of an elephant.

person 2: wow thats incredible. *obligatory downvote*

person 1: i cant believe there is actually nobody that dislikes this newsfeed. well, its about a migrated disabled kid that survived cancer and the war.

person 2: *obligatory downvote*

obligatory downvote by sbstr October 14, 2011

obligatory 

ADJ. Morally or legally constraining and/or binding.

ADJ. Required by obligation.

Your attendance at school is obligatory.

obligatory by Steve Beger March 24, 2004