Yung Joc: Everyone Needs to Do What I Did ... Relax

Yung Joc knew exactly what he was doing when he let his hair down ... he got skewered on social media, but it's all paying off.

The rapper was leaving Wood Ranch in L.A. Friday night when our photog asked why he did the do.

YJ's plan worked to a tee. There is one problem ... a certain mineral would do him in like Kryptonite on Superman.