I'll start with the mother of all classics known the world over:
''Same same but different'' - Said to me by a sales assistant when I asked him what the difference was between two pairs of trousers.
''You same same Thai man'' - The reply I got when I asked for it ''all night back my loom'' after a short time experience upstairs at the Best Corner beer bar, Pattaya.
''You jai damm mak mak'' - What a uni student girl said to me as I stripped her clothes off on my sofa. I think she must have been joking.
Must be a few others to share...