Millennials are more likely than other generations to take time off without telling their bosses, a new poll found.Taiyou Nomachi/Getty ImagesMillennials are "quiet vacationing" or taking time off without informing their employers.A Harris Poll found that 38% of millennials have taken secret time off, more than Gen Zers and Gen Xers.Many workers face pressure to be always available, which may be blurring lines between work and PTO.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 opting to take time off without formally taking any paid time off, let alone informing their bosses.It's called "quiet vacationing," and millennials, in particular, seem to love it.Nearly four out of 10 millennials said they've taken time off work without actually informing their employer, according to a new survey of 1,170 employed Americans conducted by The Harris Poll.