cat face n. aberrant surface features or an irregular appearance on fruit, vegetables, or trees, especially when caused by healthy tissue growing over damage. Also v., adj., attrib. (source: Double-Tongued Dictionary)
Further reading
The autocomplete function on your phone comes in handy, of course. But is it changing the way we write and how linguists study language? Also, suppose you could invite any two authors, living or dead, to dinner. Who’s on your guest list and...
After hanging out with San Diego sailing enthusiasts, Martha picked up several bits of slang and jargon. Catenary describes the desirable curve of an anchor chain, from Latin catena, meaning “chain.” A chain that is not pulled up...
As long as anyone that I know in the plastering trade can remember. The blemishes or hollow spots that show up on the surface while troweling are known as “cat faces”. Something to be avoided they are removed by repeated troweling with additonal plaster or more likely with the “fat” which is the plaster that builds up under your trowel while water troweling the “putty coat”.