Seems iffy. Star Wars smugglers also deal in routes and distance. Making it part of the slang could lead to dangerous misinterpretation for those in the biz. It "ain't like dusting crops" after all.
Not when it's actually used in a sentence such as, "My ship can go 12 Parsecs". We all understood Han meant some sort of speed and not how much gas he had in the tank when he spoke of the Kessel Run. In-universe they would automatically know he meant 12 Parsecs per the standard unit of time for ship speeds and not 12 Parsecs maximum distance since that would obviously be way too small for a ship in Star Wars to get anywhere like we see.
When someone says, "I'm 5 10", we know he meant he's 5' 10" tall and not 510 pounds.
Edited by Sturn