A Dirty Fern is a young women completely obsessed with the male Penis, she literally cannot get enough and will often have statues and ornaments to satisfy her insatiable appetite for cock if she does not have the real thing at hand.
I Rogered this chick last night, she was amazing and total Dirty Fern!

Girl “I cant wait to see you tonight I’ve been thinking bout that dick all day!”
Guy “OMG You are such a Dirty Fern!”
by FatThor August 21, 2019
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Guy: You see that Dirty Fern?
Guy 2:Yeah they are so cool!
by SpoopyPlant March 5, 2022
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