look up any word, like swag:
 
1.
Hafa Adai (pronounced HALF A DAY) is "Hello" in Chamorro, the native language of Guam and the islands of the Northern Marianas. It's basically used the same way as the word "Aloha" in the Hawaiian Islands.
Hafa adai and welcome to Guam, "where America's day begins".
by somethingnew November 12, 2007
 
2.
This salutation or greeting is similar to "Aloha" in Hawaii. Just as Hawaiians are well known for saying "Aloha!" so are the natives of Guam just as well known for saying "Hafa Adai!" The greeting "Hafa Adai!" is literally translated into English as "What Friend" or "What Partner" But, because the literal translation loses meaning, the best or most close meaning is "How are you, Friend?" Or, "What's up Friend?" or "Hello!" A greeting you would say to someone you consider a friend. In Guam, the Chamorro greeting is a very friendly way of welcoming people. It's Polite, and Friendly. If you see a Guam Bumper sticker in the USA it will most likely say "HAFA ADAI" on it. The correct pronunciation of Hafa Adai is just like "Half a Day".
A Chamorro girl sees a cute Island Boy (Chamorro Boy) walking past her and she smiles kindly and says "Hafa Adai" and he nods and says "Hafa Adai" back.

As they pass each other they both smile. Two strangers greeting each other as friends. :) That's the Chamorro way.
by SummerGirl <3 May 17, 2011
 
3.
It means: Hello, how are you (in chamoro).
Hafa Adai dude. Why don't you make me some spam.
by Guam1234 June 12, 2009
 
4.
Does not mean "hello"
Means "What's up?"

When you're speaking to somebody, and they don't hear you, they'll say, "Hafa?"

Which leads someone, even if they don't speak the language, to know that it means "What's up?"

Pronounced "Hoffa Day"
Man arrives at party
"Hafa Adai!"
by m00sik March 21, 2009