Infested with lice or cooties; lousy or of poor quality.
Derived from 'cootie' with the adjectival suffix '-y' added, creating an informal adjective to describe something infested or unpleasant.
This word perfectly shows how a noun (cootie) becomes an adjective just by adding '-y'—English is wonderfully flexible at turning any noun into a descriptor by slapping a '-y' on the end.
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