rusty kangaroo
When you're doing anal with a 280+ pound women (reverse cowgirl specifically) and you pull her fupa up, stick your cock in, slap the fupa down and bust. That my friend is a rusty kangaroo, store it in the pouch.
I picked up this Heffer from the bar, she taught me the rusty kangaroo... if she ain't 280 she ain't a lady.