I’ve never heard “full ass” as an actual term anywhere, but I wondered about it since the actual term “half-ass” implies there should be a theoretical meaning for going full. If “half-ass” means insufficient work/performance, then would going full mean maximally sufficient? Or since “ass” is generally treated as bad, does going full mean maximally insufficient (i.e. 0% complete and/or worst-quality work)?
There’s a similar query, but its answers solely focus on “half-ass,” with passing mentions of a “full(y) ass” without pinning down a definitive direction.
complete or completely: It's not a snack; it's a whole-ass meal. https://dictionary.cambridge.org/dictionary/english/whole-ass
– user 66974 Mar 25 '23 at 16:24