I regularly use the same gifs and don't want to google them all the time. I remember i saw an app like this on Product Hunt but can't recall the name.
- Not a direct solution. But I use it for "storing & forgetting". Their menu bar app allows searching by name, contents, text or color. Again, might not work for you in some cases.
- I use Raindrop chrome extension, and they have a mac app as well. Maybe a little bit overkill on what you're looking for, also there's Google Bookmark manager if you want an even simpler approach to image bookmarking, not entirely saving images, but just bookmarking.