Dime dropper American slang countable noun
It was derived from the concept of putting a dime (coin) into a payphone to make a call.
Used to refer to someone who is a informer
Mark is the dime-dropper who snitched on me, although he my best friend.
The gang has been searching high and low for the dime-dropper in order to take revenge on him.
Plural noun: dime-droppers.
Peter admitted that he was one of the dime-droppers.
This phrase was used in the 1960s.
If you take a flyer (on something), you take a chance, risk, or gamble on it.
The coach took a flyer on the young goalkeeper, and it turned out to be a wise choice.