1 definition by JWgaff

Top Definition
The act of intentionally sabotaging and destroying another person's otherwise happy relationship due to desire for that person's significant other (which sometimes can be aided by unhappiness in the offender's current relationship). This act may or may not include actual infidelity with the desired other.
"Can you believe it? That asshole just Janis-ed my relationship!"
by JWgaff May 04, 2010
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