A couple of years ago my sister gave us SNATCH for Christmas. At first glance it isn't unlike Scrabble, but oh, it's so much more fun! No more sitting around waiting for ten minutes while someone works out they can put IT on a double letter word...in SNATCH you have to keep your wits about you and turn words already formed into other words - so that you can snatch the original word away from your opponent and gain some extra words.
I tell a slight lie although it isn't intentional. She actually gave this game to our son but we all played it together. However, when he went off to Canada for six months he insisted on taking it with him (it's so small it fits into a backpack) so we had no choice but to buy a replacement.
It's in my bookshop but here is the link if you want to take a look.