To politely tell someone they are being a bitch. They are being both sensitive and sentimental at the exact same time. It allows you to tell someone that they caring about shit that you don't give a damn about.
1. Your boy: "Yo, i can't go out with the crew tonight, my girl wanna stay home and watch THE NOTEBOOK"
Your Response: "You bein real sensimenative right now, quit talkin soft and come on!"
2. Sensimenative Facebook Friend Status: "My life sucks, i miss my girlfriend, my puppies, and my nintendo wii"