The only thing rich about Rick Ross’ new chin tattoo is the irony.

Ross just posted the ink pic on Instagram — but clearly, the Boss isn’t familiar with the #1 rule of the universe … tattooing the phrase “Rich Forever” on your face pretty much guarantees you will NOT be rich forever.

It’s true, Ross is rich — reportedly worth around $30 million — but he’s not rich enough that he doesn’t have to worry about money for the rest of his life … especially the way he spends it.

Then again … “Rich for the next few years” doesn’t really have the same ring to it.