Cardinal Rule

The Cardinal Rule a substantial rule that is in place in a certain situation or organization. And it must not be broken at anytime.

'You must never date your friends ex. thats the cardinal rule of friendship'

'You broke the cardinal rule didn't you? Spies don't fall in love' - NBC's Chuck

'Never date a co-worker, its the cardinal rule. because when it all blows up in your face. your screwed'

122👍 30👎