Eat in a house then excrete on the roof.
More Thai Proverbs:
When the river is filled, Be quick to fetch some into your bucket.Thai
Doesn't paddle, but puts his feet in the river.
Thai
Search for a needle in the ocean.
Thai
There are no secret in the world.
Thai
Nobody lift the dog's tail when it defecates.
Thai
Found a nice tree when your axe broken.
Thai