The surprise and delight experienced when something is significantly better than originally anticipated. As per Susan Boyle on Britain’s Got Talent. The judges and audience expected a poor performance based on Susan’s frumpy appearance, but once they heard her beautiful voice – were completely overwhelmed and duly erupted into rapturous applause. If Susan had been more ‘visually appealing’, they would have expected a good performance, and consequently been less moved by the experience.
Real Estate Agent: So....what do you think of the apartment, is it what you are looking for?

House hunter: I love it! I was not expecting it to be anywhere as good as this... the pictures didn’t do it justice. Where are the papers? I must sign up today. Do you think I could get a two year lease?

Real Estate Agent: Gotta love The Boyle Effect.... works every time!

by Grounds April 26, 2009
Get the The Boyle Effect mug.
When something terrible surprises you when it turns out to be mediocre, thereby juxtaposing the aforementioned terrible something making it appear brilliant.
Susan Boyle is a fugly man-woman. Her singing voice, however, is very average. Because she is so damn ugly, this surprised everyone into thinking her singing voice was angelic. It isn't.

Steve: The Wizard of Oz was a great film...

James: No it isn't. It just appears that way because it was made in a period when all other films were in black and white.

Steve: Aah, the Susan Boyle Effect!
by Acoustic JB October 9, 2009
Get the The Susan Boyle Effect mug.