Ex: "Hey Marco, wanna go see a movie tonight?"
"-.-- . .- --..-- / ... ..- .-. . -.-.-- / ... --- ..- -. -.. ... / ..-. ..- -. -.-.--."
"I don't even know how you spoke Morse Code with your mouth..."
Once thought be a telecommunications method from the 19th century, it's actual origin involves the tapping of a vagina at standard intervals in order to create sexual arousal.
Using your mouth and lips to create popping sounds to recreate morse code. This can be used when communicating with friends and coworkers in a new way so no one will know exactly what it is you are talking to each other about.
A bank teller used MCMP (morse codemouth popping) to alert a coworker she was being robbed to alert the authorities without the suspect in question even knowing!