Bible Dictionaries
Obbing

Webster's Dictionary

(1):

(n.) The refuse thrown back into the excavation after removing the coal. It is called also gob stuff.

(2):

(n.) The process of packing with waste rock; stowing.

Bibliography Information
Webster, Noah. Entry for 'Obbing'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​o/obbing.html. 1828.