sow
☞ For idioms containing sow, see the entry for the main word in the idiom (for example, make a silk purse out of a sow's ear at silk).
space
space
waste of space: seewaste.
watch this space used to indicate that further developments are expected and more information will be given later. informal
☞ The space referred to here is a section of a newspaper available for a specific purpose, especially for advertising.
1979Julian RathboneThe Euro-Killers Where is he? Watch this space for exciting revelations in the next few days.