Is have a "x" in a domain to join word a good idea?

We all know there isn't much dictionary word .com domain out there, so many people are taking domains like my-clay.com or domain that has multi-words.

So currently I'm finding a domain, and expectedly it said unavailable, so I was thinking is using a "x" in a domain to join word a good idea?

For a example that uses x to join word is like AndyXapp (originally andyapp), is it a good try? Since I found out some magazine has use topics like sportXcamping