When I read that I imagined LinkedIn is refering to the groovy programming language http://groovy.codehaus.org/
Of course... that doesn't make a lot of sense for a personality trait either... It makes as much sense as describing someone as C++. Maybe I'm misunderstanding something here.
Groovy (or, less common, "Groovie" or "Groovey") is a slang colloquialism popular during the 1960s and 1970s. It is roughly synonymous with words such as "cool", "excellent", "fashionable", or "amazing", depending on context.
Well, in my defense, I know what it means to be groovy and sorry if post made it seem otherwise. What I was misunderstanding was the fact that you can actually endorse personality traits on people since I have made a point of staying as far away from LinkedIn as possible. I thought that you were only able to endorse skills, and so when I saw they were endorsed for a personality trait I was a little confused and wondered if they meant that as a skill trait :)
I interpreted the OP as saying that the uncle endorsed "Groovy" as a skill (presumably the programming language), but probably thought it was a personality trait.
Of course... that doesn't make a lot of sense for a personality trait either... It makes as much sense as describing someone as C++. Maybe I'm misunderstanding something here.