An immoral sect of fanatics in the 15th century; so called
from Picard of Flanders, their founder, who called himself the New
Adam, and tried to introduce the custom of living nude, like Adam in
You are as hot-headed as a Picard.
This is a French expression, and is tantamount to our “Peppery as a
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894