A Japanese term with several different meanings. It can be onomatopoeia for the sound of a bird chirping (ちんちん chin-chin), a Japanese equivalent of the "beg" command for a dog (チンチン chin-chin), and it can also be used as a euphemism or slang for male genitalia (ちんちん chin-chin).
This phrase is commonly associated with Mystia Lorelei from the Touhou series, because she is a bird youkai. For tagging purposes, this tag is only to be used when Mystia herself is saying the phrase, or when it's used to refer to her (as in post #510353).
