The shoey made its way to major motorsport for the first time in 2015.
It all started with V8 Utes driver Ryal Harris, who performed the very first motorsport shoey at the Perth round of the series in 2015.
From goldcoastbulletin.com.au article,
“Yeah, I was definitely the first one to do it,”.
“A couple of weeks before Perth I was on the beers with my mates and we were doing shoeys at my mate’s house and I just said, ‘If I get on the podium in Perth, I will do a shoey on the podium’.”
But When V8 Supercar driver David Reynolds did a shoey after winning the second Saturday race at Darwin’s Hidden Valley later that year, it got mainstreamed (at least in Australia).
After this Jack Miller, Daniel Ricciardo and Valentino Rossi have performed 'shoey' to make it a global phenomena.
References: carthrottle.com, foxsports and wheelsmag.com.au.