Outside of plants, “lily” can be a personal name or a slang term for something pale or pure. “Horny” is a sexual adjective. There is no known song, book, film, or meme titled “Horny Lily Work.” If you encountered this phrase in a private message, social media post, or adult context, it is almost certainly a coded or idiosyncratic term not recognized by mainstream dictionaries.
Responsible speculation: It could be a deliberately misspelled inside joke, a username, or a spam keyword. No legitimate professional industry—floral, carpentry, textile, or literary—uses this phrase.
If you meant "Holey" (referring to pest damage) or "Horn" (as in a plant structure):
Even if "horny lily" was a typo, here’s how to make solid paper lilies (e.g., for events or decor):