A urine test that reveals evidence of narcotics.
if you smoke weed and take a drug test you are likely to get the "dirty drop".
by Anonymous May 16, 2004
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A killin 5-piece rock/jam/funk band from New Brunswick, NJ. Check more out at www.thedirtydrop.com.
Don't bother taking a shower before The Dirty Drop plays, you're just going to be filthy afterwards anyways...
by the ketchup July 11, 2008
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When you creampie in a girls asshole and let it drop into your mouth.
I have my girlfriend the best dirty yogurt drop last night. We both enjoyed it!
by Christuffher May 25, 2017
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To fail a drug test or piss test. Drug tests are usually given by either a probation officer or a parent/guardian. The test requires for you to urinate in some sort of container, while afterwards your urine is tested for illegal substances. If you test positive for any illegal substances, you just dropped dirty.
Dude, my PO is comin' tomorrow. I'm gonna drop dirty for sure.
by Miss Kristin July 18, 2006
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you failed a drug test

you pissed in a cup and it came back dirty meaning you failed your drug test
Shamika dropped dirty in her PO's office... agian
by Joe Schaefer July 18, 2005
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The act of hanging someone by their feet and then proceeding to sit on their chin and release anal seepage down their face.
"Would you rather get dirty Dutch dropped or have a Cleveland steamer done to you?"
by Kangar17 February 14, 2014
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