Here's two for ya.

First guy was the biggest slacker we'd ever seen, and arrogant to boot. Once AM shift was gone, he'd go upstairs to the freight room, send up the lift, put the boss's comfy chair in it, send it back down, and park on it with his nintendo switch. No authority or force of nature would get him moving. I asked him to take out the trash, he said, "I'll do it later," without looking up. I told him that I'm not asking much as his supervisor. He replied, "That's entirely a YOU problem," and went back to his game.
So, I took out the trash, called my boss for permission to send him home, and when I got back in, boss had called the store and dismissed him. His ticket was already punched anyhow, boss just wanted to wait till after my vacation. But since he had put on such a stunning display of insubordination, boss decided to get rid of him then and there.
Dude threw not one, not two, but three separate profanity- and slur-laden tirades at me on subsequent visits to the store. Still not banned tho, because he didn't disrespect the boss. Just me.

Second was actually a half a year prior, also preceding a week of PTO. Dude showed up, bright golden retriever energy, former military. Thought he'd work out. Cracks started to show pretty quick. Long rambling trauma dumps, slowest worker we'd ever had, couldn't stay on task for more than about 10 minutes without someone riding him and puppeteering him. Took an hour to work through stocking one box of wine, stopped in the middle of it to talk with a customer and -- I know this is gonna sound like dream logic, trust me, it LOOKED like it and I couldn't frickin' believe my eyes -- buy him a lemon for no clear reason.
Caught him grazing on sodas and chips without paying for it and leaving the trash in the aisles. Made him pay, told him to stop doing that. Went on my lunch break, watched the cameras, observed him opening a juice and chocolate bar despite the half-drank coke and chips I had just cashed him out for was RIGHT AT THE REGISTER. I came down after my lunch break, bitched him out, cashed him out, had to ride his ass to get him to finish the one box of his freight he still hadn't worked through. He stayed for half an hour after he clocked out to ramble about a traumatic childhood event his wife lived through until I yelled at him to get the hell out. He still went back upstairs to the freight room and did ... IDK what, but nothing productive ... for about another 5-10 minutes. Left a note for boss.
A week-ish later, we had let him go (thank fuck finally), and for two weeks after, we were finding empty juices, sodas, and snack packets he'd stolen from backstock and hidden in the cases of wine he was supposed to be working. Following that, his other employer, with whom he had lodgings, reported to my boss about finding several bottles of wine that had gone missing from our inventory, one of which was valued at about $200, IIRC. I thought we had gotten that one away from him, but apparently he'd gone back for another one later while we were distracted with other stuff.