Definitions by J-mo1217
gungbung
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.
bung
Verb--the past tense of the verb "bang", i.e. to have sex with someone. Also, when using the past tense of "gangbang", gungbung is considered a possibly substitute.