The word watchman is tied in my mind with Rembrandt's The Night Watch.

3 minutes ago, Bill W said:

The term night watchman has fallen out of 8se.  Now, most people just refer to them as the guard on the overnigh t shift.  

When I was a kid, the term night watchman was frequently used for the men that roamed the railyards to keep out kids and adults trying to get in a boxcar and ride to somewhere else.  It was also used for the men that patrolled the warehouses to keep out thieves.  

Today, a WATCHAN is a small device shaped like a parachute and about the size of a quarter that prevents blood clots in the left arterial appendage.  It is NOT a pacemaker.  

Around these parts, a night watchman is also called a shotgun.

1 minute ago, drpaladin said:

Around these parts, a night watchman is also called a shotgun.

One or two barrels?

1 hour ago, Myr said:

One or two barrels?

There is a lot to be admired about the open maw of a double barrel, but the awesome and universally recognized shuck shuck of a pump beats it hands down.