The phrase "pick over" generally means to selectively examine or choose something, often in a critical or careful manner. Some synonyms for this phrase include scrutinize, analyze, inspect, sift, sort through, go through, and evaluate. Depending on the context, other synonymous phrases could include sift out, weed through, comb through, or cull out. When trying to find just the right word to replace "pick over," it's important to consider the tone and purpose of the original phrase in order to choose the most appropriate synonym.