The buttocks can wiggle and jiggle when a person dances. The buttocks do not dance--they don't have that ability.
A fanny is a person's buttocks. Buttocks ("butt") or fanny includes both cheeks, thus, every person has one fanny.
Their buttocks
It means the person they are referring to has larger than average buttocks and most times is used in a way that indicates the person is attracted to the buttocks.
In British English, "fanny" is a slang term for a woman's genitals. In American English, "fanny" is a slang term for the buttocks.
Sure, if you do it hard enough.
A badunkadunk is a vernacular slang for a person's buttocks, particularly of a woman.
No, most people do not have the flexibility to do that.
it is a tattoo found on the face,arm,thigh,and buttocks of a Maori person
Playing with one's buttocks can be a personal behavior that varies from person to person. Some men may engage in this behavior while others may not. It is not necessarily common or uncommon, but rather a personal preference.
It means the person you are referring to has buttocks that are rather flabby or loose and has a larger butt.
A butt-slapping is an act of slapping of a person's buttocks, usually out of jest.