Chief Keef's baby mama is putting the rapper on blast for allegedly not paying child support.

TMZ shares that Keef allegedly fathered a child when he was 15 and was ordered to pay around $3,100 per month in child support based on his income of $13,000 per month.

The child's mother claims Keef hasn't been holding up his end of the deal and has filed legal documents against him.

She claims the 'I Don't Like' rapper has only paid $1,900.

A judge has ordered the Chicago native to appear in court in September to explain why he hasn't ponied up the dough.