Teen Mom star Amber Portwood was just reamed out in an Indiana courtroom, accused of violating her probation and pulling a no-show for two urine tests.

Law enforcement sources say Portwood got popped on December 16 for possession of a controlled substance. It's unclear what exactly the substance was.

She also failed to provide mandatory urine drug screening results on December 16 and December 19. Not a smart move when you're on probation already.

That's not even all. Amber Portwood is on the hook for various other alleged probation violations, including failure to complete anger management class.

A judge recently ordered her to set up a college fund for her young daughter, Leah. You can probably guess whether or not that's happened.

Spoiler: It has not.

As such, Amber was ordered to remain in custody until her hearing in late January. At that point, the Teen Mom's longer-term fate will be determined.

SIDE NOTE: This is her second straight Christmas in jail. Wow.