People on reddit/or on this wikia take this seriously:
I wasn't the first to do that as if you take a look at my profile pic, which I found on Google image search, is a cat liara...
It's a dumb joke thing based on boredom. And fyi it's category is under user images, it's not an actual thing. I'm just messing/joking around.
And I've explained my wikia name before.
Shepard because I was joining the ME Wikia, and cat because I'm really dumb on names so I thought of one of my favorite animals, thus this.
But anyways I only found out about it due to some on my friends here on the ME chat. lol..
the internet is a wonderful place.