English Idiom of the day: Not for the faint of heart

not for the faint of heart:

scary, terrifying

a tough challenge

Example 1:

If sheer cuteness and personality were the only factors, we might all have goats in our life. But raising goats is not for the faint of heart. You need to prepare for a lot of work.

Example 2:

One of the world's riskiest jobs is cleaning the windows of skyscrapers, and window cleaners put their lives in danger regularly to earn a living. This job is not for the faint of heart.