Abwheel is an awesome thing!!! a wheel with two handles... Sit on your knees, stick your butt up, hands on the handles, roll forward to lye down, roll back to get into first position. I do five sets of fifteen DAILY. I got six pack. but boy, I eat pizza or other shit for two weeks (my last vacation) and it's GONE...
my buddies at the gym are BIG, but not as defined as i am...
i have no idea how, but i made them to do one excersise that BUSTS your abs really well.
On your pulley (down) connect rope. Sit down on your knees face forward. hold rope with hands around your neck, dive forward to touch floor with your forhead, then back. Fucking aih... My buddy who thought he is going to have flabby abs forever is shocked how well it worked for him. In a year his belly is almost gone. Now it's time to get difined. And that is why he uses some paper to get there before summer (the high for today here is 35)...
My English is not perfect, but you get good idea where I stand with flabby abs. They don't have to exist. Just work on it and keep your diet...