From barnacle1. Keeping tight and not letting go, even in the event efforts are created to dislodge. An excessively clingy person with annoying tendencies whom latches to folks (that always are unwanting regarding the interest) is said to barnacalize men and women. 2. a tremendously tight hug, moreso than a glomp and constantly an unwanted thing. Can be utilized more usually as a derogatory method to say hug.