A four-year hiatus hasn’t dulled the roughened garage hooks and sneering choruses of party-punk brats Drunk Mums. The Melbourne quartet’s fourth album also proves that guitarist/singers Jake Doyle and Dean Whitby, bassist Adam Ritchie and drummer Jonny Badlove haven’t grow up too terribly much since forming the band as teens in 2011. Not a song here cracks the three-minute mark, and Drunk Mums get much giddy mileage out of simple refrains about coming alive after dark or inventorying the chemical debauchery of a Saturday night. But for all the blurted momentum, quickie guitar solos and wobbly harmonies, Drunk Mums aren’t quite as ramshackle and shallow as they pretend to be. Inspired by a thankless warehouse job that Doyle suffered through, opener “New Australia” mocks the dull toll of capitalism to a degree that edges into social commentary. “Apocalypse” is similarly fed up with the status quo, looking forward to the bliss of never having to work another day when the world finally falls apart.