Conor McGregor marked the 20th of April as he wished his followers a 'happy 420' in a smoke-filled snap.
He shared the snap from what looks to be his pub The Black Forge as a pint of its custom stout is visible in the corner.
Previously he has shared photos of himself holding a blunt while bragging that his hemp farm in Oregon produces the best strain in America.
Hemp is from the same species of plant as cannabis and it is legal to sell hemp products in the states.
It is used in McGregor's TIDL Sport Plant-Powered Cryotherapy Topical Spray, which he launched last year.
The former two-weight world champion is continuing to take his injury rehab slowly but has recently made a return to sparring.
McGregor and pal Cian Cowley boxed "a few rounds" at Crumlin Boxing Club last week, where the pair are both known to train alongside their MMA work at SBG Ireland.
The Notorious had returned to hitting pads in boxing sessions earlier this year, but was only allowed to take on a full spar last week.
Watched on by members of the famous Dublin gym, the pair sparred for a short session. Photos were later posted to McGregor's Instagram page with the caption "my first spar".
And speaking with Mirror Fighting after an exhibition bout at Crumlin Boxing Club's annual Good Friday Show, Cowley expressed that McGregor was like he had never stopped training when the pair stepped into the ring.
"He was in with me, we just had a few rounds," Cowley said of the spar. "Conor's always training like that. People go on like 'he's back', he never left and he's always training.
"Just because you don't see it on the internet doesn't mean he's not training - it didn't shock me at all, it's Conor McGregor, like.
"Everyone knows, real fighters know a real fighter when they see one so it doesn't shock me, it doesn't surprise me. The fella is an animal and it's an honour to train with him."
And Cowley believes that only a fool would write off McGregor's chances should he get the comeback fight of his choice against welterweight champion Kamaru Usman.
The Dubliner would be a monstrous underdog against the seemingly unbeatable Nigerian, but that hasn't stopped him angling for an historic world title fight at a third weight.
"Never write Conor off," Cowley declared. "Worst mistake ever is writing Conor McGregor off, that's the truth."
Get the latest sports headlines straight to your inbox by signing up for free email alerts
