Are you ready to rock? All together now: “Big bottom, big bottom, talk about bum cakes, my gal’s got ’em!” Yes, the majestic lyrics of Spinal Tap classic Big Bottom, a titter-ye-not, adolescent schoolboy highlight from 1984 “rocku-mockumentary” This is Spinal Tap. If there ever was a context in which rude lady bits were actually funny, that was it.
