Zigzag, my hair isn't.
Crinkly, it definitely is. I don't know if 90 degree angles is what 'they' meant when they said zig zags - but, my hair does go one direction, and then make a sharp turn in the middle and go another direction. Might not be a 90 degree turn (I've never whipped out the protractor on my hair
) but it's definitely not a 'curve'
I have some curls. I definitely, however, do not have a curl pattern. I call my hair 'kinkywavy', as I think that's the best description of what it actually looks like - it's not smooth, even waves, it's wild, frizzy, unpatterned waves/bends.
Here's a couple examples.... (yeah, I was taking pictures of split ends.
)
Those might not be 90 degrees, but they are pretty sharp.
A clump of hair. No curls, some 'waves' but mostly just - madness.
So, I think that 'zigzag' was simply the best way to describe it..... I can't think of a better phrase off of the top of my head.