[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.
Source: wiktionary
Cockblock
Synonyms for "cockblock"
Ranked by relevance and common usage.
Sample sentences
2 total sentences available.
Excitement surged through him and his groin tingled tight. He heard himself growling low in his throat. At his stop he considered staying on. Maybe she would get off without the dude. Cockblocking chump motherfucker.
Source: wiktionary