From bat + cape.
batcape (plural batcapes)
- Alternative letter-case form of Batcape
1978, May, Cincinnati Magazine[1], page 32:The rabbit's feet and batcapes were selling like crazy.
1994, Film Review[2]:Right, anoraks off... and batcapes on.
1997, Paul Roen, High Camp[3], page 63:He takes her in his arms, after first removing the batcape she's got draped over her shoulders.