When a non-British person deludes himself/herself and thinks that all British people are nice and sophisticated which is really not true most of the time. There's rude and uncultured people everywhere, no matter what nationality you are.
American: Sometimes the people over here in the U.S. are so rude. I just wonder what it's like living in the U.K. where people are a lot nicer.

British person: Oh Hell no! I'm British and most of us here aren't bloody nice! You must be suffering from a case of sophisticated Brit delusion.
by CelticEagle February 13, 2019
Get the Sophisticated Brit Delusion mug.