Green’s Dictionary of Slang

of a person, or thing, unpleasant, ‘slimy’.

1935		(con. 1920s) J.T. Farrell Judgement Day in Studs Lonigan (1936) 760: This oozy bastard.
1986		S. King It (1987) 941: More plants here, hanging ones, spiderplants, he didn’t want to touch any of them, not those oozy green runners.