1. Someone who is allways around and wants to be just like you. They swing from your nuts in atempt to follow your every move.
2. A piece of dry Duck butter or underwear lint stuck to your Sack.
After having unprotected sex with a girl and you bust in her afterward you proceed to go down on her and attempt to suck the jizz from her box thus "cleaning her barnicle"
"Last night I had no rubbers but my girl said it was all good as long as I pull out i totally forgot so I had to give her a Barnicle Cleaner; it sucked my lips are still salty"