When a lesbian cuts off a man flirting with another woman.
The bullish dike just muff blocked me. Just like cock blocker. Muff blocker just cut me off.
A term used to describe a woman, typically a PAWG or Snowbunny, whose notably large and pronounced buttocks are humorously or erotically said to "block" or make it impossible for a white guy's (whiteboi's) penis to reach her vagina due to its size, emphasizing the perceived sexual inadequacy of white men in the BNWO fetish.
"That chick's got such a whiteboi blocker; no wonder she's only into BBC."