Here's a breakdown of what it might mean:
* Misheard: It could be a mishearing of a similar phrase, such as "great lush" or "very lush."
* Slang: It might be a slang term used in a specific region or community, possibly with a meaning related to:
* Something enjoyable or pleasurable: Similar to "great" or "awesome."
* Something luxurious or abundant: Similar to "lavish" or "opulent."
* Typo: It could be a typo for a different word or phrase.
To understand the true meaning, you'd need more context.
For example:
* Where did you hear it? (A specific location or online community)
* What was the context? (What were people talking about?)
Please provide more information so I can help you understand the meaning of "gert lush."