Cockblock

[Mark Zuckerberg]

1. To prevent a male friend or associate from getting some action.

2. Any such attempt to prevent a male friend or associate from getting some action.

[Rihanna]

1.The act of obstructing one persons advances towards another.
2.A situation that obstructs; an obstacle
3.An act of ill etiquette in which a male is speaking to one female in a group of females, and the alpha female creates a disruptive environment.

[Britney]

a person who interferes with ones sexual intentions with another person

[Rihanna]

1. To interfere with a mans attempts to seduce a woman.

2. abbr. Cockblocker(n.)

[Justin Bieber]

To fully understand the ways of a clockblock, one must set a scenario. Ok, say youve been out all night hanging with this girl, and can sense that you are mere seconds away from going upstairs too hook up with her. Here comes your good buddy cockblock. His drunk, attention-needing self jumps right into the picture and tells your woman how beautiful she is, then throws up all over her. Instead of giving you a quality BJ, she drives old Cockblock home, leaving you by your lonesome to jerk off all night.

[Magaret]

Prevent (someone) from succeeding in their attempt to engage in sexual activity.