when several people participate in having sex at the same time at a point in the past. A substitute for the past tense of the word "gangbang", much like the word bung.
Being so immensly gay, that your name changed to Chuck. Prime example: Chuck Casper. Chuck's name wasn't always Chuck. Before the transformation it was Nikki. But upon Nikki's GungaBungagay, he was instantly changed to the douche named CHUCK..