We had a temp to do filing, he was in his 50s and had been top level manager in the city before having a nervous breakdown. He stank of BO (proper raw onion smell - vom) and carried a briefcase to work every day with his sandwiches in....until one day we spotted he also had a hunting knife in there. We mentioned this to our manager and thankfully he never retuned.
A bloke who insisted on wearing his camoflage kilt on dress down Fridays, with sandals (no socks) - even in the depths of winter. On normal days, he would change from trousers and shoes into his kilt and sandals to walk home in. A colleague told me she couldn't look him in the eye after he put his foot up on the edge of the desk opposite her to do up his sandals one evening, and got an eyeful of bare testicles
A lady who insists on singing showtunes and high-kicking her way around the office, but thinks nothing of shushing everyone else in a very rude way.
God - the KFC bones thing reminded me of a South African colleague and (thankfully ex)housemate of mine; she was VILE. She cooked all her meat and fish on a George Foreman grill, but despite using it twice a day never cleaned it. It stank to high heaven - it was caked in grease and chunks of meat and fish. She used to use it before work to cook her lunch on and she smell used to make me vomit in the mornings. I started working an earlier shift to avoid it! She had no sense of food hygiene and would defrost meat straight onto the counter - but she imagined she was really clean; she used manky dishcloths over and over again for weeks on end (until me or our other housemate would throw them away) so we always had to re-clean the counters etc. She just used to wipe the stuff onto the floor, and we had to clean that up. The real shocker was the eggs....she always bought those massive trays of cheap value eggs, as she ate eggs with everything (fried usually). Anyway, me and our other housemate noticed once that these eggs were over a week out of date - and she was still eating them. She then went home to South Africa for 6 weeks, leaving the eggs in the cupboard. When she came home, we expected her to throw them out - but she didn't...she ate three more of them first. And she wondered why she had bad guts?! She also had quite bad BO, probably because all her clothes were polyester and only ever washed on a quick wash at a low temperature. Most people at work would be very shocked if I revealed the full truth about her George Forman habits etc....!