A large amount of yapping, a monologue in which the speaker doesn't actually say anything of real value.
Term coined by JReg on YouTube.
"Which one of you people ordered the yappacino?"
"Well, that was a hell of a yappacino you gave us there"
A slang term for verbal diarrhea. Often used on girls, especially ones that are obsessed with Starbucks (though this is not necessary), due to the punny name.
Bro I don't remember ordering a yappacino