Seem to get a kick out of keepin me on all fours

from Nas (Ft. Joel "Jo-Jo" Hailey) – Black Girl Lost Lyrics on Rap Genius

Meaning

This woman enjoys getting men to fiend over her like dogs. (on all fours)

Also, this line is probably insinuating that she likes to keep men having sex with her so she can get access to their wallets.

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