Guitarist Phil Demmel explained the song's meaning to Sonic Excess: "'Locust,' is a concept I came up with, based on a few people I have encountered in my life, just like everybody has. The type of person that just comes into your life under a different guise, under false pretenses, to befriend you, be your buddy, be your man, be on your team, or, you know, to be your lover or whatever. Their goal is just to soak up all your resources and just to drain you of all you've got, whatever you have to offer. Once they're discovered, they fly off into the next crop and drain that of everything. Yeah, it just feels like hell."