I've worked here all of my 'adult life'. [=I've worked here since I became an adult]
People who are close friends as children aren't always friends as 'adults'.
The university offers a popular program of 'adult education'.
(..) of spiders living in them, so... Okay, well, they're my shoes, and I paid for them, so it's kind of none of your business. Yeah, well, I was just asking you to be an adult every now and then, so... I know, but still. Yeah, okay. I'm Team Adam. All right, ladies and gents. (..)2017 TvShow: Superstore Title: Cheyenne's Wedding Season: 2 Episode 20