*Uh boy, please tell us it ain’t so.

17-year-old Chief Keef has been in the news quite a bit lately, but this time may truly take the cake.

He allegedly got a MIDDLE SCHOOL GIRL pregnant and she is suing the rapper for child support. The girl filed the petition for child support in Chicago, claiming Keef — real name Keith Cozart — fathered a baby daughter with her back in 2011, according to TMZ.

Okay, though there is no mention of the girls exact age, let’s do the math here: According to the docs, she currently attends a Chicago middle school — middle school is grades 6 through 8; meaning she could have been in 6th grade when she conceived.

Damn!

Cozart was 15 at the time.

It is considered a misdemeanor in Illinois for two people under the age of 17 to have sex … even if they’re in a consensual relationship. When both parties are between 9 and 17 years old, the older person commits a crime called “criminal sexual abuse.”  Punishment for the crime includes a maximum one year sentence in jail … and a requirement to register as a sex offender for ten years — but in reality, these cases are almost never prosecuted.

If the girl’s parents decide to press charges, Keef could face a judge; but some think that if this hasn’t happened already, it probably won’t.

The girl is suing Keef for an undisclosed amount of child support, including health insurance and other medical expenses. Calls to both Keef’s people and the girl’s family were not returned.

Keef was just sentenced to 60 days in juvey for violating his probation on a gun charge.