A point of no return in your life? Things were no longer the same after it. It changed for better or worse. Because turning back is dangerous, physically impossible or difficult, or prohibitively expensive.
Its meaning comes from allusion to the crossing of the river Rubicon by Julius Caesar on his way back to Rome in early January 49 BC. His crossing of the river precipitated Caesar's civil war, which ultimately led to Caesar's becoming dictator for life.
poor mark 😢
Quitting my last job without my 2 weeks. I was putting in 72- 84 hour weeks, which had killer overtime, but was destroying my health and family life. I got called in for another shift, started getting ready, then just called in, said I quit, texted my supervisor where my hard hat was, and, done.
Now that sounds like my last job.