ok abs. give it to me. what do i need to do?

Its usually the last place you lose weight, so sticking to a cut in calories till your body fat drops to near single digits as a man (not sure of the percentage for women) and it will start to show. No exercise is going to make it show any quicker, just make it more impressive when it does show. Cutting carbs, particularly wheat, cutting back of dairy and also drinking a lot of water helps some people shift any water weight you may have around that region if you are close, if you are close you should have good to excellent definition around your biceps and shoulders, clear lines of separation even without flexing.

If you want to work on your abs while you wait do the following two or three times a week:
1) Hanging leg raises on a pull up bar, bringing your feet to your hand
2) Cable crunches, hold at the bottom
3) Weighted Russian twists
4) Weighted sit ups with the weight above your head (not in front)
5) Standing ab wheel

You have to get to a rather low body fat % to get visible abs, which can be difficult with diet and cardio alone. Try adding heavy lifting? I am finally starting to see mine even though I've stopped dropping pounds.