Two Irish nuns were sitting at traffic light  in their car when a bunch of 
rowdy drunks pulls up alongside of them. "Hey,  show us your tits, ye bloody 
penguins!" shouts one of the  drunks. 

The Mother Superior turns to Sister  Immaculata, "I don't think they know 
who we are - show them your cross." 

So Sister Immaculata rolls down her window  and shouts, "Screw off ye 
little fookin wankers, before I come over there  and rip yer balls off!" 
Sister Immaculata looks back at the Mother Superior and asks, "Was that 
cross enough?"