What is being sheltered anyway?

Urban Dictionary's definition of

"Sheltered"

1. Someone who has been secluded from the real world.
2. A person who is sheltered is usually naive and does not know how the world works in reality
3. Promotes unawareness and makes them vulnerable to be taken advantage of by corrupt, evil and manipulative people.Anything fun is presumed to be evil.  

Ok, so it has been made aware to me by my colleagues that I am what you would call "sheltered". There are many, many, many movies I have not seen, food I have not eaten, activities I have not taken part of. I do not consider myself naive or easily taken advantage of just simply I've missed out on a few things. In the last year I have caught up with some movies such as: Bill & Ted's Excellent Adventure, Good Will Hunting, Fight Club, Beetlejuice just to name a few. I held a baby, tried poutine and french toast.

Lots more first times to go...