Definition

British text-speak for 'jolly good show,' aka the most aggressively polite way to say 'nice one.' Common among people who think Peaky Blinders is a documentary.

Example Usage

Did you see they added a new Lord of the Rings series? JGS!

Source: Urban Dictionary (https://www.urbandictionary.com/define.php?term=JGS&defid=10248986)