Green’s Dictionary of Slang

weirdo adj.

eccentric, odd, bizarre, out of the ordinary.

1960		Mad mag. June 46: Flipped me – hipped me with some weirdo dreams.
1968		Time 16 Feb. 36: He is being blackmailed by a weirdo youth.
1975		L. Rosten Dear ‘Herm’ 77: Mr. Bulbemann wrote a kind of weirdo remark on my paper.
1996		P. Cornwell Cause of Death (1997) 45: What? He’s got some weirdo disease?
1999		Guardian Weekend 28 Aug. 60: Other weirdo teas don’t count.
2012		R.A. Dickey Wherever I Wind Up 170: When Tim Wakefield or I get roughed up, it’s that weirdo pitch we throw.
2023		(con. 1962) J. Ellroy Enchanters 150: ‘Weird-o Death of a Sex Siren’ by Mr Fearless Fuzz.

In compounds