A "cliffhanger" is when a slightly chubby or overly obese female attempts to sport a bellybutton ring, not realizing that it dangles from her "fupa" (fat upper pussy area) as if hanging from a cliff. This is usually seen in girls that were once considered attractive upon receiving their piercing but over the years have attained massive amounts of cellulite resulting in a large fupa and transforming the bellybutton piercing from being attractive to hauntingly disturbing.
Ex 1: If Rosie O'Donnell had a bellybutton piercing it would undoubtedly be a cliffhanger
Ex 2: Tyler: Hey man, did you see that girl's bellybutton piercing?
Patrick: Ya man i saw that. Damn thing was a cliffhanger for sure.
Tyler: I know, the thought of it is literally haunting my memory.
Ex 3: Girl #1: Hey girl! Did you see my bellybutton?
Girl # 2: No! Did you get it pierced?
Girl #1: Yeah! Take a look!
Girl # 2: O-M-G! That's a cliffhanger if I ever saw one!