slimboyfat:
I never understood that joke.
The joke started with 'Pilate' mentioning that he had a friend name Biggus Dickus. The centurion had to control his laughter while Pilate was speaking. Realizing the discomfort of the centurion Pilate then mentioned his wife's name "Incontinentia Bottuck" to see if he would break down in laughter.
Biggus Dickus married to Incontinentia Bottuck = A big dick and a woman who cannot control her defecation presumably during anal sex..