Bill Clinton Gives a Nonverbal Status Update on Hillary Clinton

Bill Clinton was on the move in D.C. Monday morning -- but for as fast as he was going ... he didn't hesitate to give a status update on Hillary.

We got 42 leaving Reagan National Airport, and asked how the missus was doing on her national book tour. He wasn't all that chatty ... but was happy to flash a nonverbal response.

His security detail kept our photog at a distance -- one of the perks of being a former Prez -- but Bubba definitely seemed to be in high spirits here.