It's possible that:
* It's a misspelling: Perhaps the intended word was "egress," meaning "the act of going out."
* It's a technical term: It might be a term used in a specific field or industry, but it's not common enough to be widely known.
* It's a made-up word: Someone may have invented it for a particular purpose, like a fictional story or creative project.
If you can provide more context about where you encountered the word "eggressive," it may be possible to determine its intended meaning.