The phrase "whole shooting matches" is a colloquial expression that means an entire or complete set of things. Its antonyms would be words that represent partial or incomplete things such as individual parts, pieces, or elements. Words like "incomplete," "fragmented," "partial," "fractional," "divided," or "separated" would be antonyms to the phrase. The opposite of the "whole shooting matches" would be a "part" of the whole, a "piece" or "segment" of the whole. For instance, if the "whole shooting matches" is a complete set, antonyms would be a segment or a portion of the set, just like how a fraction is a part of a whole number.