It could be a few things:
* "East, while" - This would be two separate words, possibly part of a longer phrase.
* "East while" - Could be a typo for "East wind", which refers to a wind blowing from the east.
* "East while" - It's possible you heard a foreign phrase that sounds similar.
To help me understand what you meant, can you please provide more context?
For example:
* Where did you hear this phrase?
* What was the overall topic of the conversation?
* Were there any other words or phrases around it?