Top Definition
COCKBLOCKER ; A person who prevents a friend from macking with someone else.

Someone who purposely butts in on a friends coversation with a guy/girl preventing him/her from getting it in.

To interfere with someone who is getting acquainted with, conversing with, or hooking up with a member of the opposite sex
Oh Boy He's Such A Yamil Wall-e Oliver. Smh -___-
by t2Fresh&t2Fly October 24, 2010

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