Badgering  is a transfiguration spell that turns a target into a badger. In late 1992, a student in Transfiguration class accidentally performed this spell on a classmate, earning a shouting from Professor McGonagall as consequence. 
This spell may be related to the Cauldron to badger spell.
- Harry Potter and the Chamber of Secrets (First mentioned)
- Harry Potter: Trading Card Game (First identified as Badgering)