Similar to the meaning of a person who "cock blocks," except this arrangement of "dome" and "blocker" sounds a lot cooler, than cock blocker. A person who interferes, or gets in the way, of somebody scoring on a female of their personal and sexual interests.
Hey Ryan, don't be such a dome blocker to Kevin! You know he likes Barbara and all, and he can't have you trying to steal her away from him.
by gotLumpia October 1, 2008
Get the Dome Blockermug.