verbScottish, North American
Of crops, manure, etc.: to become excessively dry and damaged as a result of the too rapid decomposition of organic matter; (of cheese) to acquire a scorched appearance or taste. Formerly also with object: †(of a rapid decomposition process) to cause (compost) to become excessively dry (obsolete).
Mid 16th century (in an earlier sense). From fire + fang, probably after fire-fanged.