The full expression is "Let's run it up the flagpole and see if anyone salutes it." In other words, "let's try [an idea] and see how people react." Another variant is "Let's put it in a saucer and see if the cat licks it up." These kind of phrases are primarily associated with glib advertising speak of the early 1960s.
Run It Up the Flagpole was created on 2009-09-01.
Flagpole Sitta - Harvey Danger
It means things are trustworthy.
say no to it
To make a mistake
About to be sold, or given up.
To keep struggling and not give up.
pay attention.
flatter her to get something
It means shut up!
he suddenly turned up (to appear, emarge)
to make something stronger ,,