Top definition
Any overt sign of an active STD, visibly present on a man's penis, such as warts, blisters, sores, or other lesions.
She ran screaming from the bedroom after she saw his nasty cockbarnacle.
by Pope Antonio April 30, 2006
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2
(1)An ever-present, overly persistent and/or unwanted suitor or friend of a male. (2)A stalker.
man 1: Who's that fat chick that keeps hanging around you?
man 2: Some fucking cock barnacle that won't leave me alone.

man 3: Hey, man are we hanging tonight or what?
man 4: Relax dude! We aren't married. Why you gotta be such a damn cock barnacle?
by lanstopher March 05, 2009
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3
One who is an unending annoyance to others in the worst way at the worst time.
"My little brother managed to volunteer himself as my escort to my girlfriends house. I swear until my mom gets a babysitter he will continue to be a total cock barnacle.
by Bill H Black July 06, 2005
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4
"Did Richard really get Herpes from rawing Johnny?"
"Yeah know they both have cock barnacles!"
by Drfrankenstoner August 07, 2015
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