Yes, I know someone like that.
It happened a couple of years ago or so; a friend of mine went to an amusement park with some other guys and when he came back, he told me about their day there.
I was genuinely interested in the descriptions of the rollercoasters and such but suddenly he randomly said out of nowhere: “I managed to make it the entire drive there and half of the day in the park without using the toilet.”
That interested me even more than the rollercoasters.

I know that he has a larger than average bladder and can go for hours on end without peeing while keeping normally hydrated, but this comment was just mind-blowing for me.
The drive to the park had been around 5 hours, maybe 5 and a half and since they arrived early, I assume that ‘half of the day in the park’ meant a range from 6-8 hours.
That would make either 11, 12 or 13 hours for him without taking a piss once!
I wanted to enquire further, I really wished I could have.
But I feared that such questions would reveal that I was overly interested in that topic so I just said something along the lines of: “Crazy, but it isn’t that beneficial for your health.”
He said he knew that but he wasn’t doing something like this every day after all.
(I realise just now what a boring and strange response that was - like I was trying to give him a lecture

. But I just didn’t know what to say in that situation without revealing my interest).
Then we continued to talk about something else and the topic was forgotten.
But I know that he does ‘something like this’ every day.
Maybe not 11-13 hours but I’ve been spending enough time with him to know that he can easily go 8+ hours without urinating regularly.
He always says that he’s afraid of catching diseases in public toilets which is reasonable to an extent but as a male he hardly touches anything apart from himself so I never really understood.
He’s willingly putting himself through discomfort rather than just using a public toilet just because he’s super, super afraid of germs.
And I noticed it’s hard to spot any desperation, he can literally sit next to you on the sofa while watching a film and then suddenly jump up, announcing: “I need to piss!” and then dashing to the toilet.
I often saw him doing that and I’m pretty sure that it’s often a ‘Damn, I don’t want to pee right now but if I don’t go, I’ll wet myself’ situation.
I’m very sure that he’s leaked into his pants more than once but of course I cannot know for certain.