A person who serves behind the counter in a coffee shop.(noun)
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Use "barista" in a sentence
"There are so many things to make fun of at Starbucks: people talking on cell phones, annoying kids, the word barista, head lice, the fact there are thirty of you in line paying $3.50 for a cup of coffee while people are starving in Somalia."
"Apparently, one Boston-area barista is fighting back."
"Although accusing someone of working in Starbucks might be taken as an insult in the US, in Italy where the word barista originates it denotes a bartender, which of course is a noble and ancient profession."