Had a nigga's baby, little mans don’t know
Mama, was a freak, got it in on the low
12 years later when my song come on, he ask
"Mama, did you fuck J. Cole?"

from J. Cole – Trouble Lyrics on Rap Genius

Meaning

These girls eventually had children with different men, and their children don’t know that their mothers were groupies.

When the kid gets old enough to listen to J.Cole’s music, he’ll hear this song, and ask his mom “is this about you?”…

He’s also implying he’s the father of the child, hence the following emphatic “WHOA”. The kids mama was a freak back in college and Cole got it in with on the low. Her mans didn’t know and raised the child as his.

Knowing his mom went to college with J. Cole, the kid wonders if she ever hooked up with him and accidentally stumbles on the secret of his paternity.

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