live under a rock(redirected from lives under a rock)
live under a rock
To be oblivious to or ignorant of something that is very widely known, often related to pop culture. You've never heard of Lady Gaga? What, have you been living under a rock? Well, that's all news to me! I swear I don't live under a rock.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.