Final answer:
The abbreviations BD and GD stand for 'Black Disciples' and 'Gangster Disciples', both of which are gangs originating from Chicago.
Step-by-step explanation:
The abbreviations 'BD' and 'GD' commonly stand for 'Black Disciples' and 'Gangster Disciples,' respectively. Both are well-known street gangs that originated in Chicago. Gang involvement and the culture surrounding it is a serious issue that can lead to violence and legal consequences. It's important to approach this topic with sensitivity and an understanding of the socioeconomic factors that contribute to gang membership and activity.