Conor McGregor -- New Tiger Tattoo ... On Me Belly Button

How do you feel about belly button tattoos on guys?

UFC star Conor McGregor is clearly a fan ... and inked a giant tiger head around his innie while hanging out in L.A. this week.

Unclear why Conor chose the tiger ... but he's clearly proud of it.

In fact, he tweeted, "If you see the Tiger it's too late. You're food."

Hobbes would be proud.