An action of sexual intercourse in any of many various forms, usually performed by a group of people of 4 participants or more. It is used in order for the participants to gain a feeling of self-betterment or higher social status. It is also used to demean the recipient of the Bang, usually a female. Gang Bangs are also used to describe Gang rapes in which a group of same or similar size, forcefully initiates the intercourse.
"Man Jack's bitch was startin to get so cocky with us."
"Yeah, that gang bang on her last night really put her in her place."