For an adults-only gift, Cards Against Humanity
is a hilarious game that is great for parties. You can buy the card game for someone online as a gift, or you can print the cards out from the website for free and cut out the cards. This game is similar to Apples to Apples
which is another great game that can be educational for kids, and just down right funny for adults to play together. Apples to Apples also has an adult version, but I have never played it.