of·fal 
(ôfəl, ŏfəl)
(ôfəl, ŏfəl)n.
1. Waste material or byproducts from a manufacturing process.
2. Meat, including internal organs (such as liver, heart, or kidney) and extremities (such as tail or hooves), that has been taken from a part other than skeletal muscles. Also called variety meat.
3. Refuse; rubbish.
[Middle English : of-, off (from Old English, from of; see apo- in the Appendix of Indo-European roots) + fal, fall.]