The guitarist had the supergroup's title - a portmanteau of his band McFly and his friend's group Busted - inked after losing at a game of ''tattoo roulette'' with his bandmate Dougie Poynter.
He tweeted: ''I lost tattoo roulette...I've got the worlds worst band name on my foot... forever.''
Explaining how he came to get the permanent memento of the group, he added: ''It all came down to a tense game of rock/paper/scissors between me and @dougiemcfly. Best of 3. Rock let me down. (sic)''
Matt joked: ''We'd gone through regretting it, and now we embrace it. We think actually, it's so s**t, we quite like it! There was a really s**t list of names, and this was the only possible one. It was the best of a really bad bunch.''
Tom added: ''Bustfly, they were all on there. I challenge anyone to work out a better one!''
Jackson Millarker will star in episode ‘A Stereotypical Day’ set to air in the US on Wednesday evening.
The cast had teased something big was coming and all was revealed on Monday night.
The couple have recently found themselves dragged into the Brangelina divorce and even forced to deny split rumours.
The rapper teams up with Apple Music on his latest project.