A crack is a little program that bypasses a security or timelimit, so you can use it without having the original CD or serial number.
Serialz = serial numbers
Warez = versions of software that can be used with buying it, though they are illegal
FTP = a computer connected to the internet to which you can logon and upload to (copy to that computer) and download from(copy from that computer onto yours).
Crossposting = posting the same message in more than one forum on this site.
Referral programs = sites where you get paid for every member that sigs up through a special link with a code that is linked to you (not allowed here)
Think that is a short list that should help you. Maybe you can be more specific in what you would like to know....