Correctly speaking, Gin ‘n Tonic. While most people probably know that the ‘n stands for ‘and’, eggcornishly it could also stand for ‘in’, after all, the gin end up in the tonic water, right!?
Now, when I heard the drink’s name for the first time, I thought it was ‘Gin a’ tonic’. Well, connected speech and perception (and maybe even ‘nativisation’ in my case, i.e. making it sound more like ‘the perfect drink for me’ (note my name)) can do wonderful things to word sequences, in this case even clarify that the connective is and, and not either and or in… 😉
(Urban Dictionary for ‘ginatonic’: This state of being is induced by drinking excessive amounts of alcohol, and becoming non-responsive to any external stimulus…)