Green’s Dictionary of Slang

1. stiletto or ’spike’ heeled shoes.

1990		S. Morgan Homeboy 85: Sprawled on the sofa in six-inch spikes, rubber garter belt, crotchless panties and a pushup bra with nipple ports.
2001		Eve. Standard mag. 23 Feb. 28: Essential components include spikes, fishnet, PVC.

2. (N.Z./US campus) shoes, for either sex and of any kind.

1971		N. Armfelt Catching Up 110: New spikes, new track suit!
1989		P. Munro Sl. U.
1992		D. Burke Street Talk 2 53: She booked outta there and lost one of her glass spikes.