When Moriarty teaches English instead of math and has to come out with a student, cup of tea is always the code (LOL)

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When Moriarty teaches English instead of math and has to come out with a student, cup of tea is always the code (LOL)
Sherlock: Yes, but I'm very busy at the moment, I have to drink a cup of tea.
Billy: This cup of tea... code?
Sherlock: It's a cup of tea.
Billy: Because you might prefer some... coffee.
*gestures to the Lady in Red in the sitting room*
Me: *at top volume* DRINK CODE FUCKING CONFIRMED!!!
Speaking about the “cup of tea” code This is more relevant than never