Chris Brown -- Jailed For a Month ... He Can't Stay Out of Trouble

Chris Brown will stay in jail until April 23 ... he was SHUT DOWN in court Monday afternoon in his bid to win release.

Chris was arrested after getting booted from rehab Friday. The judge had ordered him to stay in rehab while he decided whether Brown violated his probation in the Rihanna case. The judge had Chris arrested almost immediately after the rehab facility kicked him out.

The judge said Chris had an "inability to stay out of trouble." Hizzoner was especially concerned at a statement Chris made at the rehab joint, "I am good at using guns and knives."

So Chris will sit in jail until April 23. The judge wants Chris in the slammer until a D.C. jury decides if Chris committed criminal assault in an unrelated case. That trial is set for April 17 and should only last a few days. It's unclear if the judge will let Chris back to attend the trial.

The L.A. judge will hold a probation violation hearing on April 23, and if Chris is convicted in D.C. he's in big trouble. Worst case scenario ... he could be sentenced to 4 years in prison for violating probation in the Rihanna case. One of the conditions -- obey all laws.

TMZ broke the story, Chris was booted from rehab Friday for violating three internal rules at the facility -- most significantly ... violating a rule specifically for Chris -- stay at least 2 feet away from every woman in the facility. He was seen touching a woman's elbow and hands.

He also violated the rule requiring him to submit to a random drug test. He belatedly had a change of heart and came up clean, but the initial refusal was a violation.

And Chris talked smack about rehab during a group therapy session.

Chris was arrested immediately after he got kicked out ... staying in rehab was a requirement of the judge pending his trial in D.C. next month for assault.