Rusty banana 

Having sex with someone on their period and then not washing off for days. The blood then oxidizes and creates a rusty film on said dick.

Oh dear God, did you hear about Jeremy? He had sex with a girl on her period three days ago, hadn't showered and now has a rusty banana.

Rusty banana by Definitely not Selena February 8, 2021

Rusty Banana 

A banana resembling a rusty johnson, i.e. a penis that is covered in shit after ass-fucking, except usually covered in a layer of nut butter from peanuts or almonds instead of shit.

Dude, that rusty banana looks like it's been up André the Giant's asshole.

Rusty Banana by chickenassholes November 15, 2010

Rusty Banana 

The act of purposefully having intercourse with a women using a Rapex Condom, causing extensive bleeding and coloring the penis red, hence the term "Rusty Banana"

Miranda gave me the best Rusty Banana last night, it hurt so good.

Rusty Banana by Rusty Shaklefordington September 29, 2013

Rusty Banana 

You must eat a chipotle burrito with only beef and with the habenaro sauce earlier in the day. Bring a girl home and while having sex with her tell her to close her eyes and lie on her stomach. Then shit on her back. Can also be subbed with taco bell fire sauce.

"Yo did you bring jennifer back to your place?"
"yeah man, we hit chipotle and she really wanted to do it so i gave her a rusty banana afterwards"

Rusty Banana by rustybanana July 4, 2016