Fedalölatschöö

The best mispronunciation:

Non: "... because she is a fan of Fedalölatschöö."
Me: "What's a Felalölatschöö?"
Non: "Oh you MUST know him!"
Me: "Never heard of it."

...General staring at me in disbelieve...

Non: "But he is the most famous Swiss guy!"
Me: "?"
Non: "The best tennis player of the world! Fedalö Latschöö!"

For all those angry now: I admit, my Thai is not perfect eighter :-)