"Tump". I have always thought Hetty Pegler's Tump was a reference to Hetty's frontbottom... in a feminine kinda way. Referring to her entrance and ladymound if you like. The site does look rather feminine. Sometimes "tump" is used to to describe a clump of long grass or bushes. It is also a term used to describe a small mound or hillock - which I have also heard called a "mott". I have also heard "mott" used to refer to a lady with loose morals or generally a girlfriend (but not in my house onviously).