My old roomie was a manager at Starbucks and I "thought" I knew the lingo till I saw him work shouting out his orders!!
I used to work as a barista at a non brand name coffee bar, and was pretty good w/our names
From Starbucks I like
Skinny mocha latte, extra shot of expresso, hold the whip
Skinny vanilla lattee
Grande Cappucino, extra foam, 3 shots of espresso, shot of toffee
=)