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.
by Definitely not Selena February 8, 2021
Get the Rusty bananamug. by Jerome steven December 6, 2016
Get the Banana Stuffermug. by Lava lamp July 26, 2016
Get the Banana fartmug. by Sack O'neill December 2, 2010
Get the Warm bananamug. by Captain_Insano March 9, 2008
Get the sludge bananamug. by Jesster_the_giraffe July 27, 2017
Get the yodeling bananamug. when a female grabs as many bananas as she wants and stick them in whichever hole she wants while screaming the annoying orange "he will mock you" song :)
"i had just gotten home and i opened her door and was going to give her a present but i found her doing banana masturbation"
by fkyoujames June 14, 2017
Get the banana masturbationmug.