I grew up with a thai best friend and learned enough on the language along the way, but as was pointed out before it is a tonal language and my tone is all screwed up!!!! As in the thank you very much that crellston pointed out, when I say it the mahk part always comes out wrong, Tong really laughed when I said it because i actually said i was stingy/selfish. But it was still fun to get the strange looks from the Thai people when I tried to speak my americanized Thai.

Another good one is mai pen rai, which is used for several purposes such as your welcome, it's ok and no problem. It is similar to the spansih "de nada", for those of you who know some Spanish.