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A conjunction of the words "dick" and "rectum". Although it supposedly means an order or decree, it actually is a discreet insult used when insulting someone of a lower IQ than yourself.
"Tom, you're a dictum".
dictum by YoureADictum April 3, 2006
Related Words
Thinking that "Tums" (An antacid is any substance that counteracts stomach acidity) are a highly dangerous and highly addictive drug. Knows side effects of being a dictum are the grating of cherry flavored Tums and snorting them through the nose. Most people also consider these people unworthy of being called intellectuals and therefore pronounced "dicks" instead.

Dick + Tum = Dictum
Little did Timmy Gonzales' mother know but her willingness to expose her son to Tums lead to a habit that later expanded into a form of addiction leading to a complete collapse of his social life and the permanent title of dictum.

"I wonder if Timmy's girlfriend knows what a dictum he is"
dictum by monotox February 28, 2005
Dictum can mean three things.

1) when a dick comes out of the rectum of a futa in hentai

2) when a dick gets erect when their rectum is stimulated (either the person watching or receiving stimulation)

3) when a dick is in the rectum
"Dictum futas really turn me on"

Or

"Goddamn, you're really giving me a dictum right now! Super hot~"
Or
"Can you give me a dictum? It's a fetish of mine"
dictum by AeronaTheFox May 17, 2021
Dictum: "I think therefor I am." ~ Descartes before the horse
Dictum by NYC1963 April 21, 2022
A text from a male (usually one who is intoxicated, the ex-boyfriend of the recipient, or who wants to have sex with the recipient) in which the main content is a picture of the male's penis.
Emily: Dammit! Mike sent me another dicture last night!
Steve: He probably got drunk and remembered having sex with you.
dicture by EZBaked October 18, 2010

Dictures 

Cell phone photos of your junk taken to trade with young ladies of loose morals.
"Oh shit, I accidentally sent one of my Dictures to my mom! Where did I put the razor blades and sleeping pills?"
Dictures by DangerDong January 25, 2009