If you wanted me to go why didn't you say so in plain English instead of making vague hints?
你想叫我走, 为什麽拐弯抹角而不直说?
At the back of his mind was the vague idea that he had met her before.
他隐隐约约地觉得以前曾经见过她.
I have a fancy (ie a vague idea) that he will be late.
我感觉他要迟到.