Flip music
From Halopedia, the Halo wiki
Flip Music is a type of music trend created and performed by humans. The colonial "slam-bam" beat of flip music is, in fact, a descendant of "rock" music that was popular in the 21st century. It seems that its popularity has diminished; most UNSC Marines hate the stuff, though Sergeant Johnson has an odd fascination with it.
Those around him, however, are less interested in this genre of music. There are many who dislike Flip, including Captain Jacob Keyes, Private Mendoza, Private Bisenti, PFC Jenkins, Corporal Locklear, and John-117.
