kissing the choo choo

The act of self-destruction despite repeated attempts by friends to intercede on the kisser's behalf. Sometimes it seems as if they just want to stand in front of the charging locomotive and get what's coming.

Mike, you know I'll back you up, but if you keep making trouble where there isn't any,and drag ME into it, no less, I'm going to simply allow you to kiss the choo choo. Kissing the choo choo is what you seem to want. Oh well...