Two Irish nuns are sitting at a traffic light in their car, when a car full of drunks pull up beside them.
"Hey, show us your tits, ye bloody penguins!" shouts one of them.
The Mother Superior turns to Sister Immaculata and says, "I don't think they know who we are. Show' them your cross."
Sister Immaculata leans out the window and shouts, "Screw off, ye little fookin' wankers, before I come over there and rip yer balls off!"
Sister Immaculata turns back to the Mother Superior and says, "Was that cross enough?"