Cody Garbrandt Shows Off Insane Back Tat, Took 25 Hours to Complete!

Wanna see a walking work of art?? Just check out Cody Garbrandt's fresh ink ... 'cause the UFC star is giving TMZ Sports the breakdown on his new tattoo!!

Of course, No Love is no stranger to the needle -- he's got tats on his neck, chest and arms ... and now his back is fully covered with an epic gladiator-esque image!!

Cody tells us the whole process lasted about 25 hours ... so yeah, tat artist Nic Westfall at the Skull Museum is one patient cat.

Cody says the most painful part of the process was when Westfall got to his lower back, because he recently had stem cell treatment.

But, the craziest thing about this -- Cody says it didn't cost him a PENNY to get done ... the dude got the hookup because it's basically an ad for the artist whenever he fights in the Octagon!

We also talked UFC with the former champ ... and he says he'd be down to face off against Henry Cejudo .... after he got called out by Triple C!!