Call it a symptom of age, but Pissed Jeans vocalist Matt Korvette doesn't want to party anymore. Just check out the first lines of “False Jesii Part 2”, the angry, anti-fun anthem that kicks off the Allentown, Pennsylvania, quartet's latest long-player, King of Jeans: “I know there are things going on tonight, but I don't bother/Only 10 minutes across town that's right, but I don't bother.”

“That's pretty much about myself not going out socially as often as I used to,” the 28-year-old singer tells the Straight from his Pennsylvania home. “I'd rather get a full night's sleep, quite honestly. I'm not dying to go out and impress everyone, but I could if I wanted to.”

While the group's sloppy delivery of Sub Pop–style grunge suggests long nights spent in dive bars, sucking back snuck-in six-packs of Pabst Blue Ribbon, the truth is that the band's members—Korvette, guitarist Bradley Fry, bassist Randy Huth, and drummer Sean McGuinness—spend most of their time at their 9-to-5s. In fact, most people who work at the same insurance company as Korvette don't even know that he spends his vacations spitting for a scummy rock act. And the ones who do know don't care.

“Everyone seems to be caught up in their own lives,” he says. “How many people are really that interested in you? When it comes down to it, they're more just interested in themselves. A lot of people are just wrapped up in their own deal.”

Judging by the bulk of King of Jeans, office life has given the singer a bad case of the Mondays. The seven-and-a-half-minute-long album centrepiece “Spent” plods by on grimy blues-metal riffs and slow-motion drums while Korvette lazily drawls out his daily disappointments, which include not getting enough sleep, always feeling thirsty, and watching his waistline grow. It's a wonder he can even get out of bed.

“I'm honestly a pretty satisfied person,” the vocalist insists. “I'm not just moping around. I'm a pretty content guy. Working at these songs can be therapeutic.”

While most of his lyrics tend to be a downer, “Request for Masseuse” at least finds the frontman getting a little bit of relief. “Rub my back like a champion/Grind your palm into my spine,” he coolly commands on the Sabbath-style sludge number, before letting loose a series of seedy, sexual grunts.

Coping with sexual tension is a major theme on King of Jeans. Between digging on gnarly punk-rock chicks on “Lip Ring”, exploring voyeurism on the trailer-thrash number “Human Upskirt”, and feeling uncomfortable while watching mainstream sex scenes on “R-Rated Movie”, the band can't help but sound depraved and dirty. While the troupe's members likely come off as normal at their day jobs, playing together lets out their noisy inner weirdos. Korvette wouldn't have it any other way.

“If it was nicely strummed with an acoustic guitar it would have a different effect. You could write about the simplest thing that's totally innocuous in Pissed Jeans and it'll come across menacing. I enjoy playing with that.”

Pissed Jeans plays the Media Club on Saturday (August 22).