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A female whose labia of their vagina resembles roast beef.
Dude, I went down on this roastie the other night. That shit was like eating an Arbys roast beef sandwich.
by Yewturn August 03, 2015
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The degenerated condition of the average sexually-liberated western female's vagina, as a result of riding the cock carousel through her teens and 20's before hitting the wall and trying to get one of the beta bux -- who she denied while it was still tight and she still looked good -- to put a ring on her finger and lick her recycled Arby's; which he will, because the world is full of thirsty beta enablers stupid enough to marry women who have had their capacity to love atomized into obliteration over a decade of getting shaken like she's in a paint shaker and then painted by cocks whose names she doesn't even remember.
Beta Bux Bill: I'm so happy to be marrying her. I had such a crush on her in high school, but she wouldn't even look at me. But now she's a bit less tight, a bit more blown out, her face lost a few points with the sun damage and semen damage, and, well, actually she's a full-blown roastie, actually it looks like roadkill between her legs, but that's okay, she's my soulmate, and I'm taking the high road by inviting all of the guys she fucked to the wedding; we needed to rent a megachurch.

Stacy the Fiance: "Who's that guy you invited to the wedding?"
Beta Bux Bill: "That's Chad, you said to invite him?"
Stacy the Fiance: "Oh, yeah! I'm gonna go say hi to him before we start the ceremony"
** 10 minutes they've both been gone **
** moans coming from the toilet **
by MrChase July 11, 2016
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A woman with millage on her poonani, she usually tries to justify her actions with the usual "genetics" argument. When in reality, she's just a hussy.
I was finally about to lose my virginity, then I found out she was a roastie :(
by Roshanda July 24, 2015
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An incel or r9k term for a woman who is not a virgin, based on a fundamental misunderstanding of how female anatomy works. They believe that a woman's labia somehow stretches when she has sex, although miraculously this only happens if she has unmarried sex with different men. The word "roastie" indicates that they think elongated labia look like roast beef.
That femoid rode the cock carousel so long, she's become a roastie. I am totally disgusted by her - why won't she have sex with me?
by CheeryCola May 23, 2018
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Roastie is an noun used to describe a woman whose genitals have somehow magically mutilated into an entirely different shape, resembling a sandwich, due to her having multiple sexual partners.

It is primarily used by men who don't understand vaginas- often because they have never seen one.
John: That female had sex with someone who isn't me! I bet she looks like a chicken sandwich down there from all the Chads she's fucking! Roastie slut!

Jenna: That guy uses the term roastie unironically. He clearly doesn't understand anatomy, or is even trying to.
by Cringe With Carro June 01, 2018
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