1. Sitting on a toilet and unloading fecal matter into the bowl.
2. Using the restroom (#2).

The term "platinum" derives from an urban clothing line "FUBU". The name itself sounds like something that comes out of your ass (feces). FUBU then upgraded their clothing line to "Platinum FUBU". Hence, an upgraded shit. So, when you drop platinum you are unloading something really nasty. The term became, "dropping platinum fubu". It was too long to say, so it got shortened to "dropping platinum".
"Hold up, I gotta drop platinum."

"Wassup, what you up to?"
"Chillin, droppin platinum"
by Kobe Nol March 10, 2008
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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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The act of disposing of your bodily waste, in the form of feces. To take a shit.
Mg : "Yo D where ya been, dude?
Dh : " Man, i was droppin' a growler.
Mg : " Awright...Really."
by wudupyo11 March 13, 2009
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Droppin' Science means to rhyme, say or do something original or unique, especially when rapping or in music. This term was notably used by the Beastie Boys in the album Paul's Boutique, track six, song "The Sounds of Science"
Well I be dropping the new science

and kicking the new ka-knowledge

MC to a degree, that you can't get in College!
by Dudeman July 10, 2004
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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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