In the song "Becky" by rapper Plies, the term is used in the chorus to refer to a white woman who is seen as being promiscuous and easy. The lyrics suggest that the speaker has had sexual relations with "Becky" and is bragging about it.
The use of the term "Becky" in this context has been criticized by some as being racist and sexist. However, it is important to note that the term is not always used in a negative way. In some cases, it can be used in a more playful or humorous way.
Ultimately, the meaning of the term "Becky" depends on the context in which it is used. In the case of Plies' song, it is clear that the term is being used in a derogatory way.