We thought DMX's three-month prison stint would end the rapper's recent string of bad behavior, but it looks like X has managed to get in trouble in jail.

The 38-year-old rapper, who's serving time for theft, drug possession and animal cruelty charges, was placed in lockdown for allegedly threatening to assault a prison guard.

TMZ reports that X refused to report for work and became verbally abusive to detention officers. The troubled rapper, whose real name is Earl Simmons, became agitated and told guards, "I already have a job and don't need this [insert expletive]." X then, allegedly, threatened to "assault somebody to get some respect."

The rapper was thrown into lockdown and placed on a special bread and water diet for his bad behavior. Way to go X.

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