The rapper posted a sweet voice note with a message from her baby to her devoted Barbz on Twitter on Nov. 27.
The audio starts off with a baby cooing, followed by Minaj speaking in a sugary voice.
"Say hi to the Barbz, papa bear. Say hi," she says to the infant.
"Whatcha doin'? Say something," says Minaj with a laugh. "Aww, you said hi to the Barbz? Good boy."
Minaj welcomed her son with husband Kenneth Petty on Sept. 30. The couple celebrated the first wedding anniversary on Oct. 21, and they shared the first photo of their little one -- an image of a tiny baby foot -- on that day.