Rob ‘Horrified’ By Chyna Boyfriend’s Child Abuse Charge, Will Use Dark Past In Court

Blac Chyna's latest boyfriend Kid Buu has a shocking criminal past including child abuse charges — and the model's baby daddy, Rob Kardashian, became enraged upon learning about the musician's sinister rap sheet, RadarOnline.com can exclusively report.

The 31-year-old father — who has been in a legal battle with ex Chyna for years — is "furious" that Buu, real name Markques Lao Santiago, was once arrested for felony charges of child abuse, and is planning to use the records to his advantage in his fight for full custody of Dream, 2.

“He is going to use this against Chyna in court, of course,” a source close to the Kardashian family told RadarOnline.com.

RadarOnline.com can confirm that Buu, 30, was arrested in March 2008 for child abuse without causing great bodily harm, robbery and obstruction of justice/threats/intimidation after a fight with the mother of his child. According to Florida court records, he pled guilty to the charges, and was later sentenced to two years of probation.

Buu was also arrested for possession of cannabis in 2013, RadarOnline.com can exclusively report. The case was eventually dismissed.

As RadarOnline.com previously reported, cops were called when Buu and Chyna, 30, got into a nasty argument during a Hawaiian vacation last month. No one was arrested, but Kardashian was alarmed, sources claimed.

“Rob feels zero sympathy for Chyna, and thinks that she likely started the fight because she is starving for attention," the source said, adding that the doting dad is going full steam ahead in his quest for full custody.

And Kardashian is not alone in his fight. According to the source, momager Kris Jenner and her plastic protégé daughters are on his side.

“Kris is going to have to have her lawyer go all the way in, because she doesn't think Blac Chyna is giving her granddaughter a safe life right now," the source explained. "She believes Chyna brought her baby around a man that has been convicted of child abuse."

Jenner wants full custody for her son, too, the source insisted: "And what Kris wants, Kris gets!"