A non-committal (on the surface) response to a statement the phrase user finds, unconventional, unacceptable, heretical or bizarre. The undercurrent or true meaning is often fuck you, and the purpose is always to denigrate or dismiss what was said.

This phrase is often used in meetings and among members of 12-step groups, especially Alcoholics Anonymous, but appears to have wider usage (see entry in The Free Dictionary).

Usage is similar to Thank you for the flowers.

When you eat dirt for the first time and leave your family to build a shack in the woods

Also know as "Thanks For Sharing" Its When someone drives past you with windows down and absolute crap music playing, or worse yet when you are both stopped at a stop light and all you can hear is their bad music.