The Collaborative International Dictionary
Kippering
Kipper \Kip"per\, v. t. [imp. & p. p. Kippered; p. pr. & vb.
n. Kippering.]
To cure, by splitting, salting, and smoking. ``Kippered
salmon.''
--Dickens.
Wiktionary
kippering
vb. (present participle of kipper English)