Larger than normal breasts for a particular lady's frame, or simply a bitch with big ass titties.
1. Food for days! from those jamungadungs!
2. Pam Anderson is the mother of all jamungadungs!
3. I just motorboated that bitch with jamungadungs over there!
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi