Mersô is commonly used to someone who's marvelous at
playing piano, incredibly sexy and/or have a very hairy chest. Someone who's able to
impregnate anyone is also called a Mersô. A girl that look like
Keith Emerson shall be called "Mersô Girl" and you shall make a song about her. Another common use of Mersô is when you reffer to someone with the ego at the size of the Wembley Stadium.
"
Hey guys, check out this! I took a picture at the Love Beach!"
"Haha...your Mersô!"
"Guys, I looked to a girl and she got
pregnant."
"Hohoho, you're such a Mersô."
"Guys, I played Bach concerts in piano without arms jumping from a plane with flying sharks!"
"Whoa!
That's so Mersô."