1. To fuck someone over, usually a person dear to you, in a seriously fucked up manner.
2. A crazy person, usually someone emotionally unstable and prone to bouts of rage and hitting and shooting things. They're particularly prone to hitting and shooting those they love.
1. We had this really romantic night, dancing, sex under the stars. She said she loved me and couldn't imagine a happier life without me. Then the next day the crazy bitch totally starbucks me by marrying my little brother! Totally didn't see that coming!
2. All was well when I left for work this morning, hearts and flowers. Then when I got home I gave her a kiss on the cheek and said "I love you baby. You make me so happy." Then she goes absolutely starbuck on me, kicks me in the harbles, and repeatedly hits me in the face. All the while telling me how much she loves me too!