You might have already seen these in the "slabs of abs" thread but here, for your possibly repetitive viewing pleasure, are some wild-ass nips:
http://i.ebayimg.com/images/a/(KGrHqUOKiME5eO-FJWLBOj584FfBw~~/s-l500.jpg
http://muscleinspiration.com/gallery/2011/12/muscleinspiration-111222-1217-05.jpeg