what is a barnacle head
barnacle-head. Somebody who is so slow, dense and vacuous that they are easily compared to the stationary parasitic marine organism (used in Spongebob Squarepants).Josie is such a barnacle-head, she got an 800 on the SAT's.. Random Word.omebody who is so slow, dense and vacuous that they are easily compared to the stationary parasitic marine organism (used in Spongebob Squarepants).