missinterest 

When you think that you're interested but you really are not interested. Thinking about doing an action at first, then not accomplishing it, due to the lack of interest in it. You are interested at first. But when you look and dive deeper into it. You really don't give a single F. Most likely is due to the lack of knowledge, which means you'll lose any interest in no time. Other possibility is getting involved into one thing and never get to do it, and leave it after a little to no time.

Alex: I am hosting an event in LA, you want to join?
Allen: Oh Yes! Sure! *Doesn't bother to ask*

Alex in the day of the event *Calls Allen*: Where are you bro?
Allen: I think I don't fit into it, to be honest. Sorry.
Alex: You could have just told me that it was a missinterest.

missinterest by Eternity9490 June 30, 2020

Missinterest 

When you miss someone or something, but you don’t want them/it back in your life.

Friend: “I saw your ex at the grocery store; they seem to be with someone new. I’m sorry.”
Me: “That’s ok; I’m missinterested in them at this point. It was fun while it lasted, but we wouldn’t have worked out.”

Missinterest by the_dreaming January 5, 2022

misinterest 

Mistaken Interest.

As a matter of habit and causual etiquette, Kevin said "What's up?" to John in the breakroom, expecting nothing more than a brief, if not exact reply. In a clear case of misinterest, John went on to describe his date with Meg (the hot new secretary), in mindnumbing detail.

misinterest by richippr September 24, 2013

missunderestimated 

Proper hard! Like ultimate boss level difficulty

I missunderestimated this task!

missunderestimated by RubberDingyRapidsBro June 14, 2024