Blue Peter 
noun
A blue flag with a white square in the centre, raised by a ship about to leave port.Manoeuvring my newly-articulated bike as gingerly as a first-time driver, I moved off with the flag on the back of the trailer fluttering like a Blue Peter....
- Whilst we were still on shore in Conquerno the Colonel, who was still on board, raised the ‘Blue Peter’ to the mast head.
- I was just about to raise the Blue Peter then and go without you, mate!
- (come) rain or shine
- come right
- come round
- come running
- COMESA
- come short
- come shot
- comess
- comestible
- comet
- cometary
- come the raw prawn
- come the ——
- come through
- come to
- come to a bad end
- come to a head
- come to a sticky end
- come to blows
- come to grief
- come to naught
- come to no harm
- come to nothing
- come to (or meet) a sticky end
- come to pass