The phrase "all locked up" refers to something that is tightly secured or inaccessible. The antonyms for this phrase could include expressions like "open," "unlocked," or "accessible." An object or location that is not all locked up may be considered "unsealed," "unfastened," or "exposed." Similarly, if something is not locked up, it may be described as "unlocked," "unlatched," or "unbarred." On a more metaphorical level, antonyms for "all locked up" may involve words like "free," "loose," or "relaxed." When something is not all locked up, it may be open to interpretation, discussion, or negotiation.