Cuntseanera (KUNT-sen-YETTA)- This is a derivative of the Spanish word "Quinceanera", pronounced (Keen-sen-Yetta) in which a girl of age 15 becomes a woman. It is a giant party much like a Bahtmitzvah. A CUNTSEANERA is a figurative party for the worlds biggest bitch, or CUNT.
girl 1: "Lupe has been a total bitch lately."
girl 2: "I guess she has been getting ready for her CUNTceanera!"