A girl who, just as the man is about to pull out, sticks her body to him in order to stop him pulling out.
"I was about to pull out, but she went barnacle. Now I have child support payments."
by Norm Norman September 3, 2009
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n: a person or group of people who will support the claims/do the biddings of their 'hull' (leader) whether or not he/she is right or his/her requests are reasonable.

Often seen in card game communities or the MMORPG arena. (I.E. Magic the Gathering or W.o.W.)
Ex. 1:

Fred the Hull: Hey barnacle - go get me a soda and then give me all of your rares!

Branden the Barnacle: Sure thing, Fred! You want my card sleeves too?

Ex. 2:

Fred the Hull: Hey, Branden - I need some water essences. Want to farm them for me?

Branden the Barnacle: Sure thing!

Fred the Hull: God, I love having barnacles.

by teh0memak3r October 18, 2006
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gray, scaly, nasty-ass psoriosis scabs
"Young Motor" Crumb has some barnacles on his ashy-ass elbows. Just playing JS; don't beat me up.
by Sampson Simpson February 11, 2004
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The act of expressing so much affection in public that people believe you and your significant other are permanently attached. Most common among teen couples, but also found in mid-life couples pre and post recommitment ceremony.
... they are so barnacled that the go to the bathroom tgether ....
by Melwa December 5, 2006
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The Spongebob Squarepants fanatic's way of say "shit", as in you messed up, or "damn it".
Patrick, "I lost the tickets Spongebob."

Spongebob, "Oh barnacles"
by PH34R3ST June 8, 2005
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An individual (or individuals) whose presence is constant, annoying, unwanted and, most of all, seemingly impossible to free oneself from. The best way to avoid a Barnacle is by way of a "Barnacle Alert," typically administered by SMS or similar technological means. This serves to warn the recipient that a Barnacle is in the area and to steer clear. Barnacles are notorious for flouting the law, so overall it's best to steer clear of them.
"Oh, man, I can't believe you got stuck with the Barnacles last night!"

"Wow! You got Barnacled last night?"

"Can you believe the Barnacles turned up tonight?"

"Who did they Barnacle this time?!"
by Jackson King May 21, 2021
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A person who attaches themselves to any living being surrounding them as a form of comfort. Cuddling, spooning and snuggling are also correct terms. A barnacle latches on to anyone in sight and does not let go.
Cheyenne: Oh hey kirsten! How are you?
*Kirsten latches on to cheyenne*
Kirsten: Now im better!
Cheyenne: Oh kirsten! You barnacle, you!
by astoldbyginger February 29, 2008
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