I've made a few frivolous purchases, but I don't think I've made an irresponsible one yet.

I consider frivolous as "unnecessary but desired" and irresponsible as "Spending funds that are not excess and intended for a debt, payment, or life necessity"

My dice sets. I was going through some serious retail therapy for my depression and might have spent about $1000 on scores of dice sets (over a period of several months to a year. But I almost have enough to fill a display case with only the d20s! Not that I would, because I use them too frequently and my apartment is currently too small for the display case.

I bought a warhammer. Then I bought a second warhammer. Don't regret either purchase.

I split my tongue in 2017. Zero regrets. I show it off all the time.

When I bought 3 ounces of weed during the pandemic

My car. I bought a luxury car back when I was in grad school and it cost me a year's salary used. I would tell anyone else not to do that, but over the years I have had so much fun driving that car. It's a 2008 BMW 328i with a manual transmission and sports suspension (which makes it rather uncomfortable, but it corners so well). It has been breaking down a lot recently and I'll probably have to get rid of it soon, which I'm not happy about. They don't make cars like that anymore and even if they did, I can't reasonably justify buying such an impractical car at this stage of my life. Maybe I'll make another irresponsible purchase anyway...

3070ti and a 43” 4k gaming monitor, sometime in 2020 when pandemic pricing was at the highest bullshit level. it would cost less than 1/2 that 18 months later, but I'm glad I didn't wait.

massive screen real estate at 144hz all the time was worth it for work alone.

Six motorcycles in 2 years

As of right now, a bunch of Magic the Gathering cards. I have nobody to play with. I regret nothing.

There's another purchase that would've been one of the most irresponsible of my life, but the seller didn't actually have the thing in stock. No, I won't tell what it is, I'll just let you folks imagine

First bicycle this summer and soon second bicycle for winter. I have never felt better than since I started commuting on my bike to and from work.

All in bitcoin

This is hard because of I like it then I don't think it was irresponsible. Generally the irresponsible things I purchase are more like monthly things or meal deliveries. I can't point at one thing and say "that's it!"

A very very expensive sixth scale action figure

My V8 Holden Ute. Sure it's not super practical but it makes up for it in Smiles per gallon.

I bought a $600 vintage, late 70s turntable that's just beautiful, pristine condition. Tbf I paid $25 on an online auction. I keep going up to it every couple of hours and just staring at it in awe. Now I need to buy a receiver and speakers to match it

Motorcycles they're all motorcycles