Green’s Dictionary of Slang

coffing cull n.

[cuffin n. (2) + cull n.1 (4)]

(UK und.) a magistrate or judge; a court officer .

‘John Sheppard’s Last Epistle’ in Dly Jrnl (London) 16 Nov. 1: Pray now do not bring it your self, / The Coffing Culls are at the Old-Baily; / [...] / If the Harman should touch you he’d nail ye.