A gothic type dyke, one who might wear fishnets/fishnet shirts, spikes (hence the name) etc.
"Oh man, look at the spike dyke, she's totally checking you out"
by Frances April 23, 2004
John: Dude, did you see the chick with the cut-off shirt and spiked hair.
Steve: Yeah, she's a complete spike dyke.
by tinki 94 April 13, 2009