cockblock noun 2verb 2forms 3 noun2 •(slang, vulgar) The act of cockblocking. •(slang, vulgar) A person who cockblocks. verb2 •To prevent someone from achieving a goal, aggressively getting in the way (e.g., an intentionally difficult level of a video game). •(slang, vulgar) To make or attempt to make another's intended goal of romantic relationship or sexual intercourse impossible.[T]o COCK BLOCK: to interfere with a male's attempt to 'win over' a female, even if the other male is not interested in the female himself. — 1972 formscockblocked · cockblocking · cockblocks