Charlie Sheen's Porn Star Kacey Jordan -- One Last Trick Up Her Sleeve ... Bankruptcy!

A hooker just can't get a break these days ... Kacey Jordan, Charlie Sheen's former porn star, warlock lover and all things sex-for-money, has gone belly up -- filing for bankruptcy.

Kacey -- one of Charlie's favorite XXX girls who also partied with him the night of his infamous cocaine binge -- claims she has a measly $290 in assets, but owes $6,000.

Why so broke? You'll recall, Kacey has vowed to get out of the prostitution game -- to find a real job -- but according to docs, the recession hit this hooker hard, because she's been unemployed since 2010.

Kacey's income -- a grand total of $300 a month -- is courtesy of her boyfriend.