To inform the police of a crime, from the time when a payphone worked on a dime, snitches would drop the dime and call the police.

We all had 25 cents when we did the crime, now you only got a nickel, you musta dropped a dime. --Papoose

Them young boys be droppin dimes over misdemenors.
by J Dolo December 13, 2008
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In basketball a nice pass that results in an assists
Im like J. Kidd droppoing dimes ten cents a minute.
by Aaron Corp August 11, 2004
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Contacting the police and ratting out someone annonomously, referring to dropping a dime in a pay phone.... back when it used to be a dime.
"Someone's dropping dimes, son, the block iz hot! They know our every move!"
by ill trooper February 24, 2003
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a sexy shot in beer pong resulting in a cup taken. This skillfull act shows class and prestige and is only done by very cool and good players. If your bad and u make a cup its not droppin a dime.
"damnn!.. WE DROPPIN DIMES !!" very nice placement.
by the nailer May 1, 2010
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to mack on someone of the opposite sex; takes place on the campus of MVNU
Dude! Check out Scotty P...hes droppin dimes on Heather
by diesel5d December 10, 2006
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The act of providing information to police/LEO regarding a crime. The act of being a rat-goof. Specifically applies to those who personally know and associate with those who committed said crime, and inform on their fellows in secret, as opposed to an innocent/random witness contacting the police.

Originates from times when a call from a payphone cost one dime, or 10 cents.
" Brian got busted on a narco-rap. He beat the rap by droppin a dime on some bikers. He said:"I know it's dangerous, but it sure beats Rikers..."
But the next day, he got off'ed
By the very same bikers.."
by Daffy Jack December 17, 2015
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