be mind-boggling
informal
1. To be extremely hard to understand; to be very confusing. Susan hasn't seen her son in 15 years. It is just mind-boggling to me how anyone could cut their mother out of their life like that. I don't think I'm cut out for advanced calculus. These equations are mind-boggling to look at. How are our taxes so high this year? Even though I've read through all of these print-outs, it's still mind-boggling.
2. To be staggering or surprising. It's mind-boggling how fast Hollywood is able to churn out these huge blockbuster films. The camera on this fancy new smartphone is mind-boggling. I mean, look at the crystal-clear detail on that flower petal! My grandparents were totally gobsmacked when we put a man on the moon. The idea of space exploration was mind-bogging to them.
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.