Add some weight to whatever ab exercises you're currently doing. Definition of the rectus abs has a lot to do with lower BF, and I guarantee you can shed some more.
I recenly started using a medicine ball with a partner doing rotations on a decline. Another thing my mma trainer has me focus on is tightening my stomach at the relaxed part of the rep and hold it for an extra second. Doing this the past three weeks and i started to see some definition where previously i had nothing. Hope it helps.
