A big old greaser is the ultimate being when it comes to unhealthy turds. It usually rates itself between 6 and 7 on the Bristol Stool Scale, and is the product of last night's low quality takeaway kebab. It has the consistency of somewhere between mushy peas and oily fish. It has the smell of any other shit, but its scent has a way of etching itself into your skin and clothes.
Person 1: Oh my god, what's that smell?
Person 2: I think that Bob may have let a big old greaser go in the bathroom?
Person 1: Classic Bob