Were like Fort Knox - Idioms by The Free Dictionary
be like Fort Knox (redirected from were like Fort Knox)
be like Fort Knox
To be inaccessible, usually because the item or place in question is locked or guarded. Fort Knox is a military site in Kentucky where stores of gold are kept. The kids are home by themselves, but don't worry, the house is like Fort Knox with all the security cameras. I can't get into the safe, it's like Fort Knox!
be like/as safe as Fort ˈKnox (about a building) be strongly built, with many locks, strong doors, alarms, etc. so that it is very safe and difficult for thieves to enter: This home of yours is like Fort Knox. ♢ Financially she’s as safe as Fort Knox. Fort Knox is a military base in Kentucky where most of the US’s store of gold is kept.