anybody who is anybody

dog who caught the tire

One who accomplishes a seemingly impossible feat, but does not know what to do next.

everybody who is anybody

All of the people who are well-known or important, especially those who have prominent social standing.

raise the flag and see who salutes

To float an idea, (or otherwise do some action) to see what response or controversy (if any) it generates, usually as a preliminary step.

though I say it who should not

Appended to a statement of self-praise, as a form of modest apology.

who are you telling

Used in response to an assertion that one is already fully aware of.

who shot John

Long and involved explanation, finger-pointing, or assignment of credit or blame.

who wants to know

A retort to a question posed by a stranger, when one does not want to either confirm or deny.

who's who

The identities of specific people, understood in terms of such distinguishing characteristics as their backgrounds, prominence, achievements, jobs, etc., as a basis for comparing them and especially as a basis for ranking them within a social group.