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.
by Miss Kristin July 18, 2006
by Joe Schaefer July 18, 2005
by charlie muphy August 24, 2009
by bayrhino January 25, 2010
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
by Anonymous May 16, 2004
Serial position in which a penis-haver lies recumbent and holds his erect membrum virilis pointing upwards. The partner, having eaten a vindaloo the precious night, squats about the erect "gherkin" and drops the drty bomb.
by ORANGEHAMSTER ALAN ORLA May 17, 2023