a thing, person, place or idea which is very "cool" "fun" or otherwise awesome; tight; not loose.
Mr. Johnson: Eddie, did you manage to turn in your essay to my inbox?
Eddie: No, I didn't have time to write it.
Mr. Johnson: That's not very good Eddie. Okay... Kurt, did you turn it in?
Kurt: Yeah, just a minute ago.
Mr. Johnson: Great! That is unloose, Kurt.