In Hungarian, bye and hi mean the same thing. There are 2 ways to say bye, and 1 way to say hi.
szia = hi and bye
sziasztok = hi and bye (to more than one person)
szarbusz (pronounced cer-boos with a short 2 O's) = bye (that's the way I say it, so people don't get mixed up)
Or if you say hi to an old lady, or someone who you "respect," like your mother, you say "csokolom," which *kinda* means "I KISS YOU!" hehe. Don't say it to girls, it makes them feel old...although, it would be the proper thing to do.
There are lots of other ways to say hi and bye in Hungarian, really old, formal ways. But the szia form is pronounced "See-ya" as in "see ya later," which came from America.
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Also, note, very important. One of the more newer ways to say hi in Hungarian is "Buzd meg," which means, literally "Get Fvcked" or "F-U". Usually only young people use it, and only amoung really good friends. If you ever say that to a store owner or a cop in Hungary, I wouldn't be surprised if you got shot.
I don't use that term, BTW, and I try stay away from those bad people who use it
"Szia haver! Buzd meg!" = "What's up homey?"....at least that's what I used to think it meant when I was back in Europe 2 years ago, when I was 16, hehe. Haver = good friend, or buddy.
Tibor