Why 'quiet quit' when you can 'quiet vacation'? Millennials are taking time off without telling their bosses. Gen Z has a different tactic.

Quiet quitting — coasting along at your job without actually leaving it or giving up your salary — became all the rage in the early years of the remote-work era, but some workers have found another way to take a break from their jobs.

Rather than coast along indefinitely, some employees are taking time off work without formally requesting paid time off, let alone informing their bosses.

It's called "quiet vacationing," and millennials, in particular, seem to love it.

In a new study of 1,170 employed American adults conducted by The Harris Poll, nearly four out of 10 millennial respondents said they've taken time off work without informing their employer. That's compared to 24% of Gen Zers and Gen Xers who reported doing the same. The survey was conducted online between April 26 and 28.

Millennials were also most likely to say they've taken actions to make it appear they were working when they weren't: Thirty-eight percent of millennials said they've moved their mouse just to keep their status on company messaging apps active, compared to 30% of Gen Zers.

They even want to look like they're working when they're supposed to be off the clock, with 37% of millennials responding that they've purposefully scheduled a message to send outside their usual hours to make it look like they're working overtime. Only 27% of Gen Zers said they've done the same.

"There's a giant workaround culture at play," Libby Rodney, The Harris Poll's chief strategy officer, told CNBC, adding, "It's not exactly quiet quitting, but more like quiet vacationing."

Millennials may be quiet vacationing more than other groups due to different generational outlooks. Rodney said on CNBC that Gen Z is more vocal about criticizing employers that don't have a good work-life balance, while millennials are more likely to find a quiet work-around "behind the scenes."

The Harris Poll also found that 78% of the American workers they polled reported not using all their paid time off, with nearly as many saying they wish they were able to take all of their available days off.

About a third of respondents said the biggest barriers to them taking more time off was pressure to always be available and meet work demands, as well as a heavy workload.

More than half the employees polled said they'd taken work-related calls while on vacation or PTO, and 86% said they've checked an email from their boss under those circumstances, suggesting that work time and personal time may be bleeding into each other in both directions.

Have you taken time off without telling your employer? Have a news tip or story to share? Contact this reporter at kvlamis@businessinsider.com or through secure-messaging app Signal at 708-476-8802.