It is a random word added to the end or beginning of a sentence. It usually applies to a sentence with a positive connotation.
Schmerk. . . you rock my life.

I just won the lottery! . . . schmerk!
by kbethr December 11, 2008
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Preston's cigarette went out while schmerking and Lauren had to finish him off.
by El Jackanator July 21, 2015
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