A striped racer, also known as the California whipsnake, is a species of non-venomous snake native to the coast and foothills of California. It is a long, slender, and fast-moving snake, identified by its distinctive stripes running down the length of its body. They primarily feed on lizards and small rodents. The scientific name for this species is Masticophis lateralis.
What's your 20?
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The phrase essentially means, What is your location? or Identify your position, but is a corrupted phrase from the original 10-20 used by United States law enforcement to verbally encode their radio transmissions to that non-police listeners would not easily discover police operations, as well as to communicate quicker and more efficiently by standardizing frequently used phrases.
These verbally-coded messages were called 10 codes, of which 10-20 stood for Identify your position, or Where are you? originally. Other such codes include 10-7 meaning the officer was busy such as with a traffic pull-over, 10-8 meaning that the officer was back on patrol such as from having just written a citation, the popular 10-4 as an affirmative, 10-10 as a negative and 10-22 to disregard a previous transmission have only seen light integration into common use. It was not uncommon for a city to have its own set of particular 10-codes for other phrases frequently used particular to that locale.
This code-phrasing is similar in design to Amateur Radio Operators (which require an FCC license) use of Q-signals, such as QTH (What is your location) and QSL (affirmative/understood) used to reduce the time needed to transmit and interpret a Morse-code transmission.
What's your 20? meaning & definition 1 of What's your 20?.