Any really great board games for all ages?

With the holiday season coming in fast the parties in my house always seem to revolve around drinking and playing with the xbox but there is always those that feel left out, younger and older people especially so this year for a change im trying to include them all but i really cant find a game everybody can enjoy, any suggestions?

Uno.
 
You're welcome.

Balderdash. Not really a "board game" but a very fun party game. Anyone of any age can play, but as humour differs between different age groups, you would probably want to pair the old against the old and the young against the young. 
But seriously, Balderdash is a laugh riot. 
 
Another alternative would be Catan. Young people like Catan, right?

Sorry is a pretty basic one that most people could enjoy! Also, maybe like dominos or checkers, just basic games that young/inebriated people can enjoy together 

Scruples

Axis and Allies. 
Don't question it.

Lego Creationary is a game I've seen grown men play and giggle. Might be up your alley.

thanks for the suggestions guys im thinking uno right now but i'll check out a bunch that you mentioned

CATAAAAAAAAAAN! 

Scrabble

A great game that my family enjoys - (even the none board game/ card game enthusiasts) - is called  bohnanza. 
 
It is very simple to learn and play, and only consists of a couple decks of cards so it is very portable and cheap to buy.  The trading aspect of the game makes everyone engaged and its quick to play!  Highly recommended.

A really good family game is Guillotine (Amazon link). It's simple to learn and humorous. SET is also good, but maybe a bit too cerebral after a couple of drinks. Of course there's the party games like Cranium, Catch Phrase, and Balderdash. Telephone Pictionary is a fun game that only requires paper.
 
Also, Uno is great.

 
TORNADO REX MUTHAFUCKA

Seconding the Settlers of Catan recommendation - that game is easy to learn and will have you laughing/hating your relatives in no time flat!

     
Great for the kids

Monopoly or Scrabble.   
 
@BunkerBuster said:

" Axis and Allies. Don't question it. "

I second the Cranium suggestions.  My family was obsessed with this game for probably 5 years and played it at every holiday get together.  Good for all ages as long as the youngest have the vocabulary for the words.  You might have situations where an 8 year old won't know who a famous person is on a card - we'd just let the kid draw a new card in that situation.
 
I love Catan, but if your family is like mine most of the players are going to want to play a game with rules that can be grasped in 3 minutes.  I've managed to get some family to play this a few times, but they generally end up not really paying attention to the rules and then think I fixed the game or something.

Mario Party

Heroquest, it's not available anymore though.

Life

chess

" Telephone Pictionary is a fun game that only requires paper.  Also, Uno is great. "

@buft

" @wubb:  hey cranium sounds good i reckon i might have seen an advert recently for that, i wonder if i got the right game in mind now. "

Cranium, Apples to Apples, Wits and Wagers, Blokus, and Quirkle are all very fun games for every age, IMO.

" Mario Party "

LIFE, dude! LIFE! 
 
Scattergories is pretty cool, from what I remember. I used to play it all the time with friends. Then my family got it and we never played it. Ha.

MORE LIKE BORED GAME!!!!

monopoly is the correct answer. 
 
the last time i played monopoly it was racist lol. it was my friend's birhtday party and he has some  porterican friends. it was a couple other white people there and all of his brown friends were in jail while the rest of us were on the board playing. it was funny.

 Zombie Dice.  It's not really a board game, but its tabletop!  I played it at pax east, and had a lot of fun with some strangers. 

I would say check out Ticket to Ride. They have three versions, the Europe one is my favorite.  It is very easy to learn but does take around an hour to play if u have 5 people.  
Good site to look for games:
http://boardgamegeek.com/boardgame/14996/ticket-to-ride-europe

Trouble. Used to play the holy hell out of this game with my mom when I was a kid.