Ever since the song "X-Kid" was released on ¡TRÉ!, Mike Dirnt has posted numerous Instagram pictures about the song's title. For example, he posted a picture of two jet trails crossing in the sky to form an "X," and captioned the photo with the song's title. He seems to have taken a liking to "X-Kid," and rightly so. It is a phenomenal song.

A couple of days ago, Mike posted an Instagram picture of his fresh "X-Kid" tattoo, placed just above the old-school cartoon design of his face. Check it out!