Uptight; repressed. She may seem laced-up at the office, but she's actually a lot of fun. She's always up for dancing the night away at a club. A: "No thanks, I'd rather study than go to a party." B: "Oh, don't be so laced-up—live a little!"
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.