Big pig's hooves is a classic phrase in TV dramas, which means "big pig's heart".
Women are all pig knuckles is used to refer to the hypocritical sisterhood between women, which is as fake as plastic flowers. On the surface, they are your best friends and good sisters, but secretly they are playing tricks!
Pig's trotters are rich in collagen. They taste very nourishing and are good for the skin, but they are very greasy. If you describe a man as "big pig's trotters", it would be a derogatory term.