Phrase/sentence used to express aloofness for another. It is meant to mitigate a situation by bluffing it to be a bigger deal than it is.
Origin: This phrase/sentence was commonly used in the 1990s by students after the
proliferation of legal litigation's in the media against large
corporations.
The most notable examples that accelerated this phrase/sentence would be the people rising to sue large
corporations such as McDonald's. People suing each other for little conflicts has also strengthened the use of the phrase.
However, in the 2000s, the RIAA's strike back, suing even children, has brought "so sue me" it a abrupt stop.