Top Definition
When a female stops another female from flirting or having sex with someone. Not as frequent as cockblocking, but just as heinous. (Akin to pussyblocker, but with a better ring to it.)
A hot chick started flirting with me at the bar last night, but her chubby friend had to notchblock the hottie, trying to get me to pay attention to her fat ass instead.
by Mr. Misterious October 13, 2011

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