Definition: “A square with rounded corners.” (Merriam-Webster)
Sample usage: If you press your finger on the iPhone screen, eventually all the squirkles jiggle.
Popularity: It makes sense once you know what it means, but it’s not obvious at first. It sounds more like a combination of “squirt” and “trickle,” like something the dog would do on your best rug.
Chance of catching on: If you’re in the business of making computer or phone applications, you’ll find it handy. Otherwise, it’s like those rounded tubs in which ice cream’s sold — the term is scround, for square/round. No one uses it, even though everyone’s bought one.
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