On the lookout for some antonyms for the phrase "onced over lightly"? This phrase is typically used to describe a superficial or cursory inspection, so some antonyms that come to mind would be "thoroughly," "meticulously," "diligently," "exhaustively," or "comprehensively". These words all paint a picture of a more in-depth analysis or examination, opposed to the quick scan that "onced over lightly" suggests. Other antonyms to consider might include "carelessly," "nonchalantly," "hastily," or "briefly," as these words highlight the lack of attention or effort put into the inspection. Ultimately, the antonym you choose will depend on the context in which you are using it and the desired effect you want to create.