The word Wrap in "That's a wrap" from the film world, meaning something they have filmed is ok, is a mnemonic for '???? rewind and print' . What is the first word begining with 'W'. I heard Michael Winner explainit a few years ago and I can't remember the first word.
Supposedly 'wrap' is Wind , Reel And Print. Wind the film back to the beginning. Reel it on to the reels used (they are of a traditional length, and the running time of a finished film could be given in 'reels' ) and Print, process the film for showing.