Green’s Dictionary of Slang

tom pat n.1

[abbr. patrico n. (1)]

a parson.

[UK]Defoe Street Robberies Considered 35: Tom Pat, a Parson.
[UK]Canting Academy, or the Pedlar’s-French Dict. 114: A Parson Tom Patt.
[UK]G. Parker Life’s Painter 137: pal.: What, are Moll and you adam’d? joe: Yes we are, and by a rum Tom Pat too.
[UK]H.T. Potter New Dict. Cant (1795).
[UK]Cornishman 6 Jan. 4/3: Specimens of mumpers' or tramps' talk [...] tom-pat, a parson.