E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
A fop, a fool, a dupe. A contracted form of cullion, a despicable creature (Italian, coglione). Shakespeare uses the word two or three times, as Away, base cullions! (2 Henry VI., i. 3), and again in Taming of the Shrew, iv. 2And makes a god of such a cullion. (Compare GULL.)