Armenian slang referencing the male genitalia (i.e. the dick). Correct usage is translated as "to my penis," conveying a sense of apathy as found in the colloquial phrase "fuck that shit", a common interjection in apathetic language.
Most powerful usage occurs when the "r" in "xeris" is extended indefinitely. This term is geographically specific to the Greater Los Angeles region, specifically bounded by the jurisdictions of Glendale, Pasadena, Burbank and surrounding vicinity (as in North fucking Hollywood).
Person 1: Hey, how was your day today?
Person 2 (Nerses): Oh wow, thanks for asking, today wa-
Person 1: XEERRRRRRRRRRRRRRRRRIIIIIISS (Xeris)