Actually no, it shouldn't. https://www.limlessons.com/en/blog_post/compound-nouns-derived-from-phrasal-verbs https://www.limlessons.com/en/blog_post/compound-n

Actually no, it shouldn't. https://www.limlessons.com/en/blog_post/compound-nouns-derived-from-phrasal-verbs https://www.limlessons.com/en/blog_post/compound-nouns-deriv... In this case, "off" is not a preposition, but "lay off" is a phrasal verb