Replying to Corks, bios, d-spins - wtf??

Pretty new to the whole freeskiin thing cause I used to be a boarder... but I went to church, confessed my sins and they handed me a nice new pair of twin tips : ) Anyway, I just need someone to explain to me the difference or what makes a cork- bio- D spin etc
I know mistys are frontflip spins and i thought i knew the difference between the rest but I was in a comp a while ago and just listenin to everyone else talkin made me think i was a bit off.
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