When you are really pissed off at someone and a regular "Fuck Off" won't do. This amplification of it is a good expression to use.
by rusty69 October 15, 2013
Tonguing a girl's cornhole while teabagging her. An equal-opportunity rusty trombone, mixed with a little nut hidin' action!
She was expecting an ordinary 69; he was lucky she didn't bite his balls off when he went all Rusty the Squirrel in her ass.
by Rusty69 April 11, 2007