noun
locomotor ataxia; difficulty walking/speaking (from alcoholism, stroke, etc.); person with such a condition
Colloquial and somewhat sensitive term for unsteady gait or slurred speech, often associated with chronic alcoholism or neurological damage. Can also refer to a person exhibiting these symptoms. Not a formal medical term.
彼は長年の飲酒でよいよいになってしまった。
He ended up with a bad case of the shakes from years of drinking.
あのよいよいのおじいさんは、いつも杖をついて歩いている。
That old man with the unsteady walk always uses a cane.
The origin is uncertain, but it may be a reduplicative mimetic word imitating an unsteady, tottering gait.