To not give a flying fuck is to be aggressively disinterested in the thing or its outcome. The full version is to not give a flying fuck at a rolling ring donut
Jon: hey it's Alice's birthday
Tony: I don't give a flying fuck
Sam: Tony wants to come to your birthday party
Alice: tell him to go take a flying fuck at a rolling ring donut
An extremely fleshy or meaty vulva, so much so that it resembles a pair of large testicles from certain angles. This is, of course, the British English usage of fanny.
Joe: would you fuck Lilly Allen?
Steve: Nah, she looks like she'd have massive fanny-bollocks.
One (male) who in conversation with a fellow, workmate etc is inclined to grab the other guy's crotch suddenly and without warning. The object is ostensibly to put the victim ill at ease and in a state of embarrassment. However, one wonders if it's simply an excuse to grab other mens' genitals.
Tony: I hate talking to Mike. I'm in the middle of a sentence and he just grabs my dick every time
Stan: yup, he's a cock jacker to be sure
Jon: so how did it go with Alice?
Tony: great! I covered her face with spaj