"Okay thank you goodbye" is a short phrase that you would say when you want to abruptly end a conversation while trying to be polite, while sounding rude at the same time.
Shaan: Yeah, I was thinking about changing my major after I found out that-
Harsh: Okay thank you goodbye
Shaan: Woww, rude much.
Ending a romanticengagement by making a casual exit, and then never returning. A ruse, to make leaving easier.
It was a wonderful summer, but I knew she wasn't the one. I told her that I needed to go to the store, but I could tell she knew it was a French goodbye.