Top Definition
Very much like the word mer, however used in long awkward silences. Mostly used to sum everything up into one phrase. People who use the word mercur are called mercurites or mercurians; can replace any word in the dictionary, and can also mean "In a nut shell"
Person 1: Talk dirty to me..
Person 2: mmmm... mercur ....

or

(one popping out of a bush in a pterodactyl-like manner and shouts : " Mercur "
by Victoria :D July 15, 2008

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