Green’s Dictionary of Slang

pancridge parson n.

[corruption of St Pancras, London, where the clergy were presumably held in low esteem]

a general term of contempt.

[UK]N. Field Woman is a Weathercock II i: Thou Pancridge parson!
[UK]Halliwell Dict. Archaic and Provincial Words II 601/2: Pancridge parson, a term of contempt.