The term "whole slews" is often used to describe a large number or quantity of something. Its antonyms would be words that describe small quantities or numbers. These could include terms like "few," "scant," "sparse," "limited," "insufficient," or "meager." Other antonyms could describe the opposite of "whole" such as "partial," "fragmentary," "incomplete," or "broken." In some cases, antonyms could also describe a reduction in size or quantity, such as "reduced," "decreased," "diminished," or "shrunk." Overall, the antonyms of "whole slews" could provide a sense of contrast or limitation, helping to define the exact nature and scale of a given situation.