When is a skirt not a skirt?

Taking the concept of "skirt" to its extremes - she walked through the commuting crowd standing guard at Liverpool street station eyes tied to the departure boards like a hypnotised audience - brown felt floppy hat (hippy variety that seems to be in vogue just now), white crochet cardigan, brown miniskirt that wasn't skimming her bottom, rather more blatantly showing her ass cheeks hanging out as they would in a pair of hot pants a la 1970 beachwear. No visible sign of any undergarments either. And certainly no tights. The voice of a thousand mothers echoed in my head, "you can't go out like that". And then she was gone. The departure board platform numbers rolled over to reveal 3 and the hypnotised moved as one towards the appropriate barriers.