An affectionate female nickname derived from the word sister. Sissy is a common nickname for a female sibling. It can also be a nickname given to a girl by others that she has cared for or behaved sisterly towards. The nickname implies that the girl is a sister or is regarded as such by family and friends. All in all, a sweet, caring girl :-)
Originally defined as "wimp", "pussy" or "weak" the word sissy has morphed into the perfect def'n of a Brazilian footballer.
Brazilian guy: "Hey man, that Brazzer baller is down crying for mom. He's hurt bad!"
Normal guy: "Nah dude, he's just a sissy. Get out the spray. His vagina is sore. Stop complaining and be a man (bitch slaps Brazzer)"