meaning of figjam is "fuck I'm good,just ask me."
used to describe person who has an unnecessarily high opinion of him or herself without them being aware of it as in " you are a real figjam,aren't you?" the persons response is usually "what is a figjam?", whereupon you enlighten them!
or can be used in a boastful manner as in "I am a real figjam, just ask me!"