designated cockblocker 

the person who stays sober at a party, club, etc. and keeps his/her friends from hookin up with grenades, landmines, or just someone ( or people) they shouldn`t

Ronnie: Yo bro mad people are hittin up karma tonight, lets go.

Mike: Cool

Ronnie: But bro, Sam`s gonna be there

Mike: That`s cool, i`ll be your designated cockblocker

designated cockblocker by Android23 January 24, 2011

Anti-cockblocker

A wingman or woman that assist you with getting what you want with women or men.

I did not warn anyone of his type in order to keep them from getting scared off. The anti-cockblocker helps her friend get some.

Anti-cockblocker by Rosalita Hanks April 3, 2019

Hall of fame Cockblocker 

When someone tries their best to stop her friend from getting piped

That bitch Diana a hall of fame cockblocker

Hall of fame Cockblocker by Poop -_- February 1, 2019