rustymongoose Share definition Flag Rustymongoose: the act of fucking someone in the ass and then having them suck your dick Yo dude I was fucking some chick last night and I have her a rustymongoose rustymongoose by Peter?69 September 17, 2016 0 0 Get merch Get the rustymongoose mug. Buy Now — $32.95 See more merch