An Insurance Agent of sorts. No, not Erin Esurance,
though we've seen a few of her wandering around in past years..
This Insurance Agent:
That's correct, Flo, from the Progressive ads. One or two girls (or guys) telling people they're planning to go with the Flo isn't a trend. Ten or fifteen people independently mentioning it in passing to either myself, my girlfriend or another friend is a borderline trend, just disturbing, or both. Not that Flo isn't, in essence, a costume. Stephanie Courtney, the actress/comedian who plays her goes through a two hour make-up job for the commercials.
If the local interpretation of a nurse is any indication, I'm guessing the Flo costumes will keep the wig, makeup, apron and a big, tricked-out name tag, but not a hell of a lot else from the real Flo's attire; most probably replaced by white bras, hot pants or boy shorts and stockings.
You may (or may not -Rule 34) be surprised to learn, much as has happened with Erin, there's now a growing amount of non-G-rated imagery devoted to Flo floating around the net. Some, having them co-starring. To be clear: to each their own, but it's times like this I don't feel like being a 25-year old straight male is too old to be writing a lingerie blog.
Speaking of which: if you really want to see a costume suggestion of an Agent for Halloween, if it's going to involve lingerie, why not go to a master, and pick one from Agent Provocateur?
Please note; I'm not going to be held responsible for any local laws you may be breaking.. May you get enough candy to rot your teeth, but remember to brush!