a product of the 1970's,white dog shit was everywhere! it was all over the place because once upon a time high quantities of chalk were addded to tins of dog food therefore when a dog would take a shit after a few days in the sunshine the poo would dry out and eventually turn white. nowadays pet food manufacturers don't use chalk in their food and this is why we don't see any more white dog shit lying around.

to sport a boner, fly the sail at full mass, rock hard, etc.