JSR - shortened version of jug-a-saurus-rex (made popular by Neil in the inbetweeners). Used to covertly communicate to a male peer when an exceedingly large pair of specimens have been spotted.
âWatch out! There goes JSRâ
âOh my god! Check out the JSRâ
âI heard from this bloke at Spoons last weekend that the last guy the JSR pulled was crushed by the weight of her jugs! He had to be rushed to A&E the poor bugger!â
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