as safe as houses
US /æz seɪf æz ˈhaʊzɪz/
UK /æz seɪf æz ˈhaʊzɪz/

1.
아주 안전한, 매우 안전한
very safe and secure
:
•
Don't worry about your investments, they're as safe as houses.
투자 걱정 마, 아주 안전해.
•
The new security system makes the building as safe as houses.
새로운 보안 시스템 덕분에 건물은 아주 안전해.