Very interesting! I did find this phrase in some dialects. It means "doing things in a casual way" (like a cat covering its feces). Hope this helps.

貓蓋屎 生物的本能 貓排遺之後 以前肢撥土覆蓋其糞便 請提示上下文 以便推敲其意

oh,I have never heard this in my life either. But literally it means cat cover its feces and it is true that the cats will cover its feces which different from the dogs.

oh,i don't konw that either,though i am a Chinese. 你可以学一些中文常用语。you can learn some chinese that is people often used.

literally, it means cat cover its feces. i dont use this word and dont know what's mean, maybe it just be localism, but not a low-culture. I did some research on the internet, in some places, it means cover the truth, with low-leverl method. and in another place, it means you are not conscientious and skimp your work. the above are just for reference only, i am not sure :)