1 definition by Corina Annetta
Someone who takes or makes themselves obstacles in your way of you getting some action or a person you like or want.
Person 1: I really like Don, do you think I can get him?
Person 2: Mmm... probably but I just smashed him yesterday, sorry.
Person 1: Oh my gosh, you knew I liked him! You're such a cockblocker!!
Person 2: Mmm... probably but I just smashed him yesterday, sorry.
Person 1: Oh my gosh, you knew I liked him! You're such a cockblocker!!
by Corina Annetta March 15, 2011