Each week on A Constant Grin, DJ Chris Mussen delivers indie rock — serious indie — plus Dada show descriptions, like the sentence on this week’s playlist: “Sweet blood bribing my reckless tuxedo egg enemies all winter.” Chris says A Constant Grin, which has been part of KDRT for years, “is a home-recorded 30-minute maelstrom of mischievous miscellaneous music that can be