tea-aboo

A person who retains an unhealthy obsession with the U.K. and British culture, typically ignoring or even shunning their own cultural identity. Many tea-aboos talk in butchered British accents. While tea-aboos claim to love and support Birtish culture, counter intuitively, they tend to stereotype British culture by how it appears in their favorite shows and movies, which can be safely assumed to be offensive to the British.

He had one of those stupid Harry Potter lanyards, he must be a disgusting tea-aboo.