I don't want to say this, but 

A preamble, often used, which precedes something that the speaker cannot resist the urge to say (for a variety of reasons including loose mouth).
It is also either or both of the following:
Extremely critical of the person being spoken to, Revealing the true nature of the person speaking.

"I don't want to say this, but you're a heartless bastard who is too eager to get into fights"

I don't want to say this, but by verbusaccidentibus February 6, 2010

i don't give a single fuck 

Stronger meaning of "I don't give a fuck."

A: Your ex-girlfriend slept with another guy in Class.
B: I don't give a single fuck! (well, you actually do)

i don't give a single fuck by Fornicras November 25, 2013

I don't feel so good 

What Spider Man is, and will always be.

Mr. Stark, I don't feel so good...

I don't feel so good by Normie Memes June 10, 2018

I don't give two fucks 

Used to put more emphasis that you don't care.

Dan: you know mom will be mad if we're late for dinner but I don't give a fuck
Tom: Well, I don't give two fucks, she makes crappy meatloaf anyway

I don't give two fucks by J'adore UD May 21, 2010

I Don't Bend That Way 

1. Something you say to someone; when someone says something that sounds Gay, or its something that you do not want to partake in. It is typically used as an expression used against someones suggestion, idea, question. Utterly it means NO. Like straight up.

2. I guess you could also use it to tell someone to stop it when they are trying to crack your back or stretch you out.

- "Hey dude do you like sausage?"

"I Don't Bend That Way!" No

- "Ouch that hurts...I Don't Bend That Way!"

I Don't Bend That Way by CrunkMonk3y January 2, 2012

I don’t know what I’m doing lol

What you can say when you literally dead because of how bored you actually are.

Dude 1: i don’t know what I’m doing lol
Dude 2: cmon let’s go play sum minecraft

I don’t know what I’m doing lol by Ummmmm hi May 14, 2020

I don't know why I have these goggles 

A phrase uttered by those who have given up on life after realizing their existence is meaningless, futile, and possibly fraudulent. Etymology: Aqua Teen Hunger Force episode "Dumber Dolls"

Happy Time Harry: Hey, wiggle jiggle, why you jiggle so much? Is it because he know deep inside you're a fraud? ... What the hell do you need night vision goggles for? You're a hillbilly!

Jiggle Billy: I don't know why I have these goggles ...

I don't know why I have these goggles by Cephiroth May 15, 2010