I encountered the male equivalent on a BA flight from Sao Paulo to London earlier this year. Apart from the obvious safety points, I was just surprised to see a top airline accepting such lax standards in the personal appearance of its front-line staff. The poor chap was never going to look smart with a shirt-stretching stomach hanging some way between belt and knees, a tie knotted loosely around an unbuttoned collar and damp-stained armpits... He wasn't a young chap, so his managers had presumably been content to keep him in a customer-facing role for some time...
As an aside, many of the cabin crew on this flight seemed a little jaded and uninterested... The crew on my outbound trip (to Rio) had been excellent, as usual.