Which episode did Lucy say GrassyAss?

It's highly unlikely that Lucy, from any television show, would ever say "GrassyAss." This phrase is considered vulgar and inappropriate for most television broadcasts.

If you're thinking of a specific show, please provide more context, such as the name of the show, the character's name, or any other details about the scene you're remembering. This will help me to understand your query and potentially find the episode you're looking for.