(comparative more colloquial, superlative most colloquial) ( 1 linguistics) Denoting a manner of speaking or writing that is characteristic of familiar conversation; informal.  Of or pertaining to a conversation; conversational or chatty.
Cotton dust is often present in the air during cotton handling and processing. Cotton dust may contain many substances including ground-up plant matter, fiber, bacteria, fungi, soil, pesticides, non-cotton matter, and other contaminants that may have accumulated during growing, harvesting, and subsequent processing or storage periods.
According to Wikipedia, the syndrome of cotton fever arises from the endotoxin produced by the bacteria Enterobacter agglomerans which is colonized on cotton plants. Heroin addicts may use cotton to filter their heroin before injection into their veins.