A vagina that has experienced too much lovin', therefore it's inner lips have become oversized and flabby.
Charlotte Page has got a very Flabby Gash!
For a male to masturbate
whilst sitting on the toilet; just after he's used the toilet for a poo.
Person A: I had a Poo Wank last night.
Person B: I don't understand why you'd want to do it?
Person A: Well the hard part was already over, taking my pants down and stuff, so I thought I might as well.