Definition of Plotcock in US English:

Plotcock

noun

Scottish
historical
  • A nickname for: the Devil.

Origin

Late 16th century; earliest use found in Robert Lindsay (c1532–c1586), historian. Apparently from Pluto + -cock, hypocoristic suffix, with change of vowel in the first element perhaps by association with plot or plot.

Pronunciation

Plotcock

/ˈplɒtkɒk/