I forgot Balderdash! Love, love, love balderdash!!
It's where they have a bunch of really obscure words with really obscure meanings (all of them are true) on a card. one person picks a card then chooses a word from that card and tells everyone how to spell it.
everyone else writes do word on a piece of paper and then makes up a definition and hands it into the person who chose the word. the real definetion also gets written down and put into the mix.
then all of the definetions are read outloud and people have to guess which one is the real one.
we always get very obscure definetions and it's always tons of fun!