Forget Gatorade, Conor McGregor‘s road back to the UFC Octagon is apparently being fueled — at least in part — by beer!!

Check out footage TMZ Sports has obtained from the MMA star’s sister’s wedding earlier this month — the 36-year-old nearly downed a whole pint of suds in a matter of seconds at Erin McGregor and Terry Kavanagh‘s ceremony out in Ireland.

Conor, of course, is currently trying to work his way back to the UFC following a three-year hiatus … but it’s clear he put a pause on his training regimen to celebrate his older sibling’s nuptials in style.

In the clip, you can see after a machine created him a custom glass of his own Forged Irish Stout — he almost took it all down in just one gulp. After tapping out a little over halfway through — he flashed a big grin showing he was pleased with his results … all while a foam mustache formed over his lip.

Based on some pics he posted from the festivities, it was hardly the only alcoholic beverage he had on the day — but it’s tough to blame the dude for celebrating … it was his big sis’ big day after all!!

Other attendees certainly partook in drinking as well, take a look at some photos we obtained … machines spit out Conor’s Irish Stout to guests with homages to Erin and Terry all over ’em.

Unclear if it means anything for his comeback fight against Michael Chandler — which has already been rescheduled once due to a toe injury Conor suffered in the leadup to the planned tilt — but before fight fans get into a tizzy … the Notorious One showed it was back to electrolytes and workouts in the days following the party.