A desperate or thirsty girl. Flocks to any source of dick in the same way a moth is attracted to any source of light.
"man Jenny has really been all over me lately. I think she's into me."

"Nah man she's just a dick moth, she s already fucked half the basketball team."
by Dilznick January 19, 2017
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When you get some type of foundation or makeup on your dick after a woman blows you.
That hoe Tiffany gave me Moth dick and I got it on my new designer jeans, I’m fucking pissed!
by Wolfwood3 July 12, 2021
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