from
The Collaborative International Dictionary of English v.0.48
Bishop \Bish"op\, v. t. [imp. & p. p. {Bishoped}; p. pr. & vb.
n. {Bishoping}.] [From the name of the scoundrel who first
practiced it. Youatt.] (Far.)
To make seem younger, by operating on the teeth; as, to
bishop an old horse or his teeth.
[1913 Webster]
Note: The plan adopted is to cut off all the nippers with a
saw to the proper length, and then with a cutting
instrument the operator scoops out an oval cavity in
the corner nippers, which is afterwards burnt with a
hot iron until it is black. --J. H. Walsh.
[1913 Webster]