When someone uses the little finger for anal sex.
"A rusty pinky will make your finger stinky!"
When a jet of rusty water gets shot into your anus.
That jacuzzi just gave me rusty rectum.
When a girl tries to stop riding you and you three finger pop her asshole and pull her back on.
I gave Kelly a good ol' rusty hitch
A old rusty paperclip used to serve lumps of dry knob cheese to you lady much like auderves at your nans funeral
Jeremy the smegma served on this rusty paperclip is divine
It's identical to the Rusty Trombone; getting rimmed with a reach around but the twist is your free hand is squeezing the trannies boobs.
I totally boned a tranny last night and gave her a rusty tombrone.
An old, dull and rusty machete.
I can't cut anything with this old "rusty mashwete".