rusty bayonet 

when a guy puts on a strap on so that he can bang her in the ass with the dildo as he penetrates her vagina, or vice-versa. Same concept as an actual bayonet, you mount an extra weapon at the bottom of your "gun" for close combat action.

"i was a little worried when she brought out a strap on, i'v never taken it in the butt, but she just wanted a rusty bayonet"

rusty bayonet by joe moma343 January 10, 2009

Rusty Bayonette 

Inserting an erect penis into someone's anus, and then pushing it back and forth between two large breasts to simulate a stabbing motion.

"So I found out she liked anal last night. When she wasn't paying attention i flipped her around real quick and gave her a real good rusty bayonette.

Rusty Bayonette by Skoolp January 1, 2012

Rusty Bayonette 

When a woman is impregnated while participating in anal intercourse... Details are left to the imagination.

Bro 1: Dude, you know that girl Rachel?
Bro 2: Yeah man, I heard she got knocked up!
Bro 1: Yeah, and she said that I'm the father, but I just Butt-fucked her, since she had a nasty Kraken Snatch
Bro 2: you must have pulled a rusty bayonette!

Rusty Bayonette by arr1029384756 September 6, 2011

Rusty Bayonette 

A sex act where an individual cuts their hand, defecates onto the wound, then masturbates oneself or another individual.

James and his partner, Stefan, died from sepsis after performing the rusty bayonette.

Rusty Bayonette by colonelwhiskers July 19, 2017