The soldiers were 'pinned' down by enemy fire. [=the soldiers were unable to move because they were being shot at by the enemy]
She's always 'dropping names'. [=saying the names of famous people she knows to try to impress others]
Reporters tried to 'pin' him 'down' on the specific changes he wants to make to the tax laws.
(..) I was just curious, 'cause I think I'd be good at it. I'm very observant. I was in the Marine Corps. I'm good with crowds. I notice there's a little pin there. That's like a signal, isn't it? - Sort of. - Signal. A secret signal for the Secret Service. What kind of guns you guys carry? (..)1976 Taxi Driver