Each player is dealt seven "red apple" cards; on each is printed a noun or noun phrase (such as "Madonna", "Canada", "The Spanish Inquisition", "Michael Jackson", etc.).
The judge (a chosen player) draws a "green apple" card on which is printed an adjective ("scary", "frightening", "patriotic", etc.), and places it face-up on the table for everybody to see. Then each player (except the judge) chooses a card that they think is the best match for the green apple card, and places it face-down. The judge shuffles the red apple cards, reads them (often aloud), and decides which noun is the best match for the adjective. This decision is subjective; the official rules encourage the judge to pick the match that is "most creative, humorous or interesting". Some might think it humorous if "mud" is played for delicious, and might give that player the point.
The player who submitted the chosen red apple card wins the round, and takes the green apple card to signify the win. All players then draw red cards until they have seven again, and the role of "judge" may pass to another person (generally going to the next player in line, though some rules have the round's winner becoming "judge"). Some editions of the game suggest discounting the last red-apple card played, to encourage players to place their cards down more quickly.
Each player is allowed a one-time only "switch-a-roo", which allows the player to discard their entire hand of red cards for a new set of red cards.
The winner is the first player to accumulate a pre-designated number of green apple cards; the more players, the lower the total.
rules from wikipedia:
So I put that one down and won the round - whereas if I was playing with someone I didn't know very well, it could be harder to know what card to pick. 
This game gets a big thumbs up from my family.
