I remember playing this at a friend of a friend's house - but I can't remember the name of it for the life of me! Friend has suggested taboo, but it is not that...
You have a card with 1-5 options - you call out a number and it might be for example "Batman" everyone else then has to write a word suggested by that - robin, joker etc on a whiteboard. But if two people have the same word then their whiteboards are out of the turn. You then have to work out the word from the remaining options.
I hope someone else knows what I mean!