G-dropping is a feature of English-language speakers whereby the -ing sound of words is replaced with an -in sound. Technically, no sound is dropped, but rather the velar nasal is replaced with the alveolar nasal. We’re not going to explain what that means.
Despite originating with the upper-class landed gentry with the phrase huntin’, shootin’ and fishin’, as well as being used by some poet dude named Jonathan Swift, G-dropping has been appropriated by the working class. Presumably they spend all their leisure time now hunting, shooting and fishing while the upper-class trade stocks and buy properties.
If you want to be a patriot you gotta drop the G.