In contrast to the phrase "most full-out", there are a number of antonyms that can be used to communicate the opposite meaning. A few possibilities include "halfhearted", "incomplete", "half-baked", "half-done", "uncommitted", "unconvincing", and "slapdash". Each of these phrases suggests a lack of effort or enthusiasm in relation to a particular activity or outcome. For example, someone who is only putting in partial effort might be described as acting "half-baked", while someone whose work is rushed or haphazard may be accused of being "slapdash". In all cases, these phrases communicate the opposite of being "most full-out".