A giant badger is a type of monster that appears in SLASH'EM, SlashTHEM and Hack'EM. In SLASH'EM and SlashTHEM, it is a quadruped that shares a glyph with the rothe, q - in Hack'EM, it is a rodent, r, that shares a glyph with several others.
Giant badgers are always generated hostile, and will not be randomly generated in Gehennom.
Giant badgers are faster than rothes and possess slightly better AC, but their melee attacks deal considerably less damage. Overall, they are fairly unthreatening.