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The Bishop's Licence is bestowed upon a gentleman when is wife is down the shops or otherwise engaged away from the house, and confers on him the right, nay, the duty to wank himself blind.
Bloke 1: You coming down the pub, Bruce?

Bloke 2: Nah Bruce, the missus's at her sister's, I've got the Bishop's Licence.
by hydraulis November 19, 2011