Sipping from a bottle of whiskey, and quite inebriated, when the local Gard walks past.
"Sister Mary", he asks "what in God's name are you doing?!"
"Not to worry, sergeant. I'm trying to hic cure the Mother Superior's constipation."
"And how is you being in this state going to help the Mother Superior with her constipation exactly?!"
"Cos when she sees me like this", Sister Mary replied, "she'll be shittin a brick!"