"He/She has left"
Here's a breakdown of the phrase:
* Upo: This part roughly translates to "from" or "away from"
* Porichalok: This means "has departed" or "has left"
Therefore, "Upo porichalok" suggests that someone has left a specific location or departed from a situation.
To understand the meaning more precisely, you would need context, such as who the "he/she" refers to and the specific situation they are leaving.