Snubstitute 

To snubstitute is to non-consensually replace something that belongs to another person with something of lesser value.

Likewise, a snubstitute teacher is a substitute teacher that is actually more annoying than your regular teacher.

1) "Jimmy snubstituted my Coke for Diet Coke again, what the hell?"

2) "Mrs. K is horrible I hate her. She's more like a snubstitute teacher."

Snubstitute by nightlifecommando March 5, 2011

substitute person 

A person that is only desired or wanted at their significant other's conveinience.

From a quote by "Claire" in the film Elizabethtown

The significant other of the substitute person may not "have enough time" or "be too busy" for a relationship, or they may only be interested for the purpose of sex, money, status, or general need of someone to talk to during times of stress. The substitute person generally won't get the emotional fulfillment from the experience that he/she may crave, and will feel unimportant yet somehow will continue on out of hope.

This can only end in tears for the substitute person.

substitute person by Bird Bird Bird April 24, 2010

Substitute teacher 

Someone who does not know anything about teaching, yet still gets payed while the students don't learn anything that day

We had a substitute teacher today so we didn't do shit

Substitute teacher by stanimal51 June 12, 2016

I reject your reality and substitute my own. 

A quote from the low-budget sci-fi/fantasy film The Dungeonmaster, popularized by Adam Savage of Mythbusters, this quote basically means "you may be technically right, but you're not changing my mind." This can come off as stubborn, but it really doesn't matter, since you don't care about the technical "facts".

Person 1: Ugh this character's design is so terrible and pointless.
Person 2: Well actually, did you know that it's design comes from goes on to prove person 1 wrong
Person 1: I reject your reality and substitute my own.
Person 2: -sigh- Okay then, moving on...

I reject your reality and substitute my own. by Kali_Gratitude_Rok7 August 20, 2018

I reject your reality and substitute my own. 

Breaking the rules: like being able to kill the bad guy even though you already died.

Sword Art Online Abridged Parody: Episode 11

Kirito: I reject your reality and substitute my own.
Kayaba: "NICE!! Dungeonmaster!"
Kirito: "What? No! Mythbusters... What the hell is Dungeonmaster?"
Kayaba: "Oh. I was so happy there for a second."

I reject your reality and substitute my own. by Animefangirl365 December 13, 2018

coffee substitute 

Any replacement for coffee. Energy drinks are commonly used as a coffee substitute. Tea can be a coffee substitute for some people, as well as caffeine tablets.

Person #1: "Do you still drink coffee?"

Person #2: "Come to think of it, not as much. I am using energy drinks much more often as a coffee substitute."

coffee substitute by yes juanito yes February 14, 2012

ligand substitution 

The act of replacing a ligand in a complex ion. This results in a change of colour of the complex ionic solution.

Rasta: What does ligand substitution do?
Me: Ligand substitution results in a different coloured solution!

ligand substitution by TheWizoid November 13, 2016