guiltguilt 

Feeling guilty about not feeling guilty about something you really should feel guilty about.

Shagging your best mates girlfriend, and loving it (but knowing you shouldn't have) - feeling guiltguilt

guiltguilt by Sam Marshallsay July 9, 2010

guiltuity

When you are guilted into tipping.

We went to a concert last weekend. There were girls in front of me hitting the “no tip” button on the register.
I felt bad… ended up tipping 18% on those 15 dollar beers. Guiltuity sucks, but people who dont tip suck even more.

guiltuity by Ed-Rivah September 28, 2023

giftguilt

The guilt that comes up (especially around Christmas, etc, but also between Birthdays) where one feels that they must buy someone a gift because that person bought THEM a gift.

This is often despite the person's insistence that "Oh, you don't need to get me anything :)", which usually just increases guilt.

James: Matt bought me a gift.
Calum: That's nice.
James: Yeah, except now I have total giftguilt because I haven't bought him ANYTHING. And I'm nearly out of money...

giftguilt by random1234567890 December 16, 2009