selamat minum

a phrase you would likely hear if dining somewhere in the area of Ubud, Indonesia when people raise their glasses of arak and other such beverages. It can be loosely translated as "welcome to drink" and is the equivalent of "cheers" in Balinese. When taking the first bite of food, "selamat minak" is the proper informality; "welcome to eat."

Selamat minum is a phrase in bahasa Indonesia somewhat equivalent to cheers, bottoms up, or some other such phrase used in English speaking parts of the world.
In Dutch try: proost!

Contrary to what I've seen written here, the proper phrase to use signalling the start of a dinner (or simply before starting to eat) is selamat makan