E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Robin Mutton (A).
Do you see this ram? His name is Robin. Here, Robin, Robin, Robin . We will get a pair of scales, and then you, Robin Mutton [Panurge], shall be weighed against Tup Robin, etc.Rabelais: Pantagruel, iv. 7.