Here's a handy little guide that should be memorised by anyone on their first visit to Thailand, some of these words are in the Isaan language and if you use them many Thai people will be surprised by your grasp of colloquial Thai.
Yet mae.............................What a beautiful day
Yet mang............................How are you?
Kuay..................................The sun is shining
Ai sa..................................Let's go
Kwai Maar...........................Handsome man
Hoop baak..........................I like you
Orn kuay............................Shall we eat?
I hayer..............................How much is that one?
Gengri...............................Delicious
Chong mang.......................No thank you
Ga-ree...............................Motorcycle
Loog-Ga-Ree.......................Motorcycle Taxi
Por Mung Tai.......................Train Station
Mae-Mung-Tai......................Bus Station
Yed Por..............................Where is?
Sudd-Na-Rok......................Very good
Tood-Muek.........................Fried Chicken
Gook Kuay.........................South-East Asia
Na-Hee.............................Over there
Ai Na Dad..........................Where are you going?
Dollair...............................Too expensive
Ra Yum.............................I'm hungry
Hee mah...........................What is your name?
Yet ped.............................Fried rice
Hee..................................Water
Baan poh mung...................I am from
Naa maw...........................Not right now
Chuk wow..........................I feel ill
Tob bed.............................Guesthouse
Hee mae mang...................Waterfall
Mai chawp khun, dag ling.......I'd like a beer please
Nah peeh...........................Lunchtime
Hua kuai............................I'm tired
Heeh men..........................What is his/her name
Mae mung .........................Noodles
See also:
The Hungarian Phrasebook sketch from Monty Python's Flying Circus
edited by dirtydog Warning, these are all actually swear words and you will most likely end up in hospital if you used these.